FEEDING SYSTEM, AND METHOD FOR FEEDING ANIMALS

Abstract

A feeding system for feeding animals, in particular cows, includes a feed supply system with feed for the animals. The feed includes one or more feed types. An autonomous feeding device is configured to automatically feed the animals with feed from the feed supply system. A feed supply observation system measures the quantity of feed of each feed type in the feed supply system, while a feed consumption observation system observes the consumption of feed of each feed type from the feed supply system. A control system is connected to the feed supply observation system in order to receive values of the observed quantity of feed of each feed type in the feed supply system. The control system is further connected to the feed consumption observation system in order to receive values of the observed consumption of feed of each feed type from the feed supply system. The received values of the observed consumption of feed are stored as historical data in a memory of the control system. The control system is configured to predict the future consumption of feed of each feed type from the feed supply system on the basis of the historical data. The control system is further configured to determine for each feed type of the feed supply system, on the basis of the values of the observed quantity of feed of the feed type in the feed supply system and the predicted future consumption of feed of the feed type from the feed supply system, an expected period of time until the feed of the feed type in the feed supply system runs low.

Claims

1. A feeding system for feeding animals, comprising: a feed supply system with feed for the animals, at the feed comprising least one feed type; an autonomous feeding device for feeding the animals with feed from the feed supply system; a feed supply observation system for observing the quantity of feed of each feed type in the feed supply system; a feed consumption observation system for observing the consumption of feed of each feed type from the feed supply system; and a control system having a memory, wherein the control system is connected to the feed supply observation system in order to receive values of the observed quantity of feed of each feed type in the feed supply system, wherein the control system is connected to the feed consumption observation system in order to receive values of the observed consumption of feed of each feed type from the feed supply system , and the control system is configured to store said received values in the memory as historical data, wherein the control system is configured to predict the future consumption of feed of each feed type from the feed supply system on the basis of said historical data stored in the memory, and wherein the control system is configured to determine for each feed type of the feed supply system, on the basis of the values of the observed quantity of feed of said feed type in the feed supply system and the predicted future consumption of feed of said feed type from the feed supply system, an expected period of time until the feed of said feed type in the feed supply system runs low.

2. The feeding system as claimed in claim 1, wherein the control system comprises a display screen, and wherein the control system is configured to display on the display screen the expected period of time until the feed of said feed type in the feed supply system runs low.

3. The feeding system as claimed in claim 1, wherein the control system is configured to determine for each feed type of the feed supply system, on the basis of the values of the observed quantity of feed of said feed type in the feed supply system and the predicted future consumption of feed of said feed type from the feed supply system , an expected quantity of feed of said feed type which is to be added to the feed supply system in order to ensure that the feed of said feed type in the feed supply system runs low only after a preset period of time.

4. The feeding system as claimed in claim 1, wherein the control system is configured to generate an alarm signal if the observed quantity of feed of at least one feed type in the feed supply system falls below a threshold value.

5. The feeding system as claimed in claim 1, wherein the feeding system is provided with a replenishing device for replenishing feed of at least one feed type in the feed supply system, and wherein the control system is connected to the replenishing device and is configured to control the replenishing device on the basis of the expected period of time until the feed of said feed type in the feed supply system runs low.

6. The feeding system as claimed in claim 5, wherein the control system is configured to generate an alarm signal if the observed quantity of feed of at least one feed type in the feed supply system falls below a threshold value, and wherein the control system is configured to control the replenishing device, on the basis of the expected period of time until the feed of said feed type in the feed supply system runs low, such that the replenishing device has replenished said feed type in the feed supply system before the quantity of feed of said feed type in the feed supply system becomes less than the threshold value.

7. The feeding system as claimed in claim 1, wherein the control system is configured to predict the future consumption of feed of each feed type from the feed supply system over a future time period which lies between 3 and 24 hours, preferably between 6 and 18 hours, such as 12 hours.

8. The feeding system as claimed in claim 1, wherein the control system is configured to predict the future consumption of feed of each feed type from the feed supply system on the basis of pattern recognition in the historical data of the observed consumption of feed of each feed type from the feed supply system.

9. The feeding system as claimed in claim 1, wherein the feeding device is provided with a holder for receiving a batch of feed for the animals, and wherein a feed loading device, which is configured to transfer feed of at least one feed type from the feed supply system into the holder of the feeding device, is provided.

10. The feeding system as claimed in claim 1, wherein the feed supply system is provided with a plurality of feed supply places, which are located separate from one another, wherein each feed supply place is configured to receive respectively one feed type , and wherein the feed loading device is provided with a grab, which is arranged so as to be movable in a substantially horizontal plane above the feed supply places, and is substantially vertically movable in order to grab respectively a quantity of feed from one of the feed supply places and to transfer the quantity of feed to the holder of the feeding device for the loading of a batch of feed for the animals into said holder.

11. The feeding system as claimed in claim 10, wherein the feed supply observation system is provided with an observation device, which is arranged to the grab in order to observe the quantity of feed of each feed type in the feed supply system.

12. The feeding system as claimed in claim 11, wherein the observation device is configured to measure, for each feed supply place, the distance to the highest point of the feed which is present in said feed supply place, and wherein the control system is configured to determine, on the basis of said measured distance, the weight of the feed which is present in said feed supply place.

13. The feeding system as claimed in claim 9, wherein the feed consumption observation system is provided with a weighing device, which is configured to measure the weight of feed accommodated in the holder, wherein the control system is connected to the weighing device in order to receive values of the measured weight of feed accommodated in the holder, and wherein the control system is configured to determine the weight of each feed type of the batch of feed for the animals loaded in the holder and, on the basis thereof, to determine the consumption of feed of each feed type from the feed supply system.

14. The feeding system as claimed in claim 9, wherein the feed supply system is provided with a feed loading place for the stationing of the feeding device when the feed loading device transfers feed of at least one feed type from the feed supply system into the holder of the feeding device, and wherein the feeding system comprises at least one feed fence for the feeding of the animals, and wherein the feeding device is configured to autonomously move a batch of feed for the animals accommodated in the holder, from the feed loading place to the feed fence, and to autonomously dispense said feed along the feed fence.

15. The feeding system as claimed in claim 1, wherein the feed consumption observation system is provided with a sensor device which is configured to measure the quantity of feed which is situated along a feed fence , and wherein the control system is configured to receive values of the measured quantity of feed which is situated along said feed fence, and wherein the control system is configured to determine the consumption of feed of each feed type from the feed supply system on the basis of said received values of the measured quantity of feed which is situated along said feed fence.

16. The feeding system as claimed in claim 1, comprising a feed storage for feed of at least one feed type, wherein the quantity of feed of each feed type in the feed storage is greater than the quantity of feed of said feed type in the feed supply system, and wherein the feeding system is configured to replenish feed of each feed type in the feed supply system with feed of said feed type from the feed storage.

17. A method for feeding animals, comprising using the feeding system as claimed in one or more of the preceding claims claim 1 to feed the animals.

18. The feeding system as claimed in claim 2, wherein the control system is configured to determine for each feed type of the feed supply system, on the basis of the values of the observed quantity of feed of said feed type in the feed supply system and the predicted future consumption of feed of said feed type from the feed supply system, an expected quantity of feed of said feed type which is to be added to the feed supply system in order to ensure that the feed of said feed type in the feed supply system runs low only after a preset period of time.

19. The feeding system as claimed in claim 2, wherein the control system is configured to generate an alarm signal if the observed quantity of feed of at least one feed type in the feed supply system falls below a threshold value.

20. The feeding system as claimed in claim 3, wherein the control system is configured to generate an alarm signal if the observed quantity of feed of at least one feed type in the feed supply system falls below a threshold value.

Description

[0039] The invention will now be explained in greater detail with reference to the accompanying figures.

[0040] FIG. 1 shows a schematic top view of a feeding system according to the invention.

[0041] FIG. 2 shows a graph illustrating repeat patterns of feeding actions.

[0042] FIG. 3 shows schematically a display screen of a control system of the feeding system illustrated in FIG. 1.

[0043] The feeding system for feeding animals, in particular cows, such as dairy cows or beef cows, is in FIG. 1 denoted in its entirety by 1. The feeding system 1 is installed in an operating area 2. The feeding system 1 comprises a feed storage 3 containing a plurality of feed types a, b, c, a feed supply system 7 having the same feed types a, b, c, a shed 8 containing the animals 9, and an autonomous feeding device 10 for feeding the animals 9 with feed from the feed supply system 7. Although the feed storage 3 represented schematically in FIG. 1 comprises three adjacent silos containing feed types a, b, c, for example silage, the feed storage 3 can comprise further storage devices and/or feed types, such as tower silos containing bulk feed, for example corn, potatoes and/or beets, or compressed bales. In the same way, the feed supply system 7 can also contain more than the three feed types a, b, c shown in FIG. 1. Obviously, in the operating area 2 may also be found a house, one or more further sheds, barns and other buildings (not shown).

[0044] The autonomous feeding device 10 for feeding the animals 9 is in this illustrative embodiment designed as a self-propelled feed wagon. Obviously, it is possible according to the invention that the feeding system 1 comprises more than one autonomous feed wagon 10, in particular two autonomous feed wagons 10 (not shown). The feed wagon 10 is movable with wheels 11 over a floor, farmyard or other ground surface. The feed wagon 10 comprises a holder 12 for receiving feed and a mixing device 13 for cutting and/or mixing said feed. For the delivery of the feed from the holder 12, a dispensing device 14 is provided. The dispensing device 14 comprises, for example, a door, which is movable between a closed and open position.

[0045] The feed wagon 10 is autonomously movable by means of a drive and steering system for driving and steering the feed wagon 10 (not shown). The drive and steering system of the feed wagon 10 is controllable by a control unit 15 of the feed wagon 10. In this illustrative embodiment, the drive and steering system comprises for each rear wheel 11 respectively an electric drive motor (not shown). The electric drive motors of the rear wheels 11 are controllable independently of one another. By controlling the speed of revolution of the rear wheels 11, the feed wagon 10 can travel straight ahead, straight back, or round a bend.

[0046] The drive and steering system comprises a battery system for storing electrical energy (not shown). The battery system is connected to the electric drive motors. In FIG. 1, the feed wagon 10 is stationed at a feed loading place or feed loading station 16, in which the holder 12 of the feed wagon 10 is filled with feed. The feed loading place 16 comprises a charging point 17 of a charging system 18 for charging the battery system of the feed wagon 10. The feed loading place 16 therefore also forms a charging station. The control unit 15 of the feed wagon 10 is configured to control the mixing device 13 such that the mixing device 13 mixes the feed accommodated in the holder 12 while the feed wagon 10 is connected to the charging point 17 and the battery system of the feed wagon 10 is being charged by means of the charging system 18.

[0047] The feed supply system 7 comprises in this illustrative embodiment a feed kitchen. The feed kitchen comprises a number of feed supply places or feed supply areas 19 for containing the feed types a, b, c and possibly further feed types (not shown). The feed supply places 19 are arranged separate from one another—the feed supply places 19 are formed, for example, by marked bays or areas on a floor, on which a block of silage or a compressed bale is accommodated. Also one or more of the feed supply places 19 can comprise a trough for receiving bulk feed, such as corn, potatoes or beets. The capacity of the feed supply system 7 is limited to a number of days. The quantities of feed of feed types a, b, c which can be received in the feed supply system 7 are less than the quantities of feed of said feed types a, b, c which are stored in the feed storage 3.

[0048] A feed loading device 20 is provided for transferring feed from the feed supply system 7 to the holder 12 of the feed wagon 10 when the feed wagon 10 is stationed at the feed loading place 16. The feed loading device 20 comprises in this illustrative embodiment a mobile carrier rail 21, which is movably fitted (see arrow A) on two fixed carrier rails 23 which are fitted in parallel and at a distance apart. The mobile carrier rail 21 comprises a trolley 22 which is movable along it (see arrow B). The trolley 22 is provided with a vertically movable grab 24 in order to grab feed from the feed supply places 19. The grab 24 suspended from the trolley can move in a substantially horizontal plane to above each of the feed supply places 19.

[0049] After the grab 24 has taken a quantity of feed out of one of the feed supply places 19, the grab 24 can move said feed to above the holder 12 of the feed wagon 10 and then drop it into the holder 12. By transferring several feed types to the holder 12 of the feed wagon 10, a batch of mixed feed of feed types according to a desired ration, i.e. a batch of mixed feed (kg) of feed types in a desired ratio, is formed in said holder. Incidentally, the feed loading device could also be integrated with the feed wagon 10. In that case, the feed loading device of the feed wagon 10 loads the holder 12 with feed in the desired quantity and composition.

[0050] Obviously, the feed supply system 7 can also be designed differently. Instead of or in addition to the feed supply places 19 shown in FIG. 1, the feed supply system 7 can comprise one or more other feed supply devices, such as a driven conveyor belt for receiving compressed bales in combination with a releasing device for releasing feed from a bale, for example a cutter or blade, and/or a trough for bulk feed having an auger for the metered discharge of the feed, and/or a tower silo and/or something else. The feed loading device can be provided with one or more driven conveyor belts for moving the feed from the or each feed supply device into the holder 12 of the feed wagon 10.

[0051] In addition, it is possible that the feed is not mixed and/or cut in the holder 12 of the feed wagon 10, but in a stationary mixer, which is arranged beside the feed supply system 7 (not shown). In that case, the grab 24 loads a batch of feed from the feed supply system 7 into the stationary mixer. After the mixing and/or cutting by means of the stationary mixer, the mixed feed is subsequently loaded into the feed wagon 10. In this case, no mixing device has to be installed in the holder 12 of the feed wagon 10.

[0052] The feed supply system 7 is surrounded by a safety fence 25. In the safety fence 25 is fitted an access door 26, so that a replenishing device 27 can enter the feed supply system 7 via the access door 26 in order to replenish the feed supply places 19 with the various feed types a, b, c from the feed storage 3. In addition, the safety fence 25 comprises a pass-through door 28 for the feed wagon 10. The feed wagon 10 can travel via the pass-through door 28 in and out of the feed supply system 7. Obviously, it is possible that the safety fence 25 comprises just one door, whereby both the feed wagon 10 and the replenishing device 27 can move in and out of the feed supply system 7.

[0053] The feeding system 1 can comprise, in addition to the safety fence 25, further safety facilities, for example an emergency stop with which the feed wagon 10 and/or the feed loading device 20 is immediately halted. In this case, an alarm can go off, for example, and/or a message can be sent to a user, such as an e-mail or a text message.

[0054] The shed 8 comprises a door opening 29, through which the feed wagon 10 can travel into and out of the shed 8. The door opening 29 can be closed off by a shed door, which preferably can be opened automatically. The shed 8 has in this illustrative embodiment two feed alleys 30. Obviously, more or fewer feed alleys can be provided. In this illustrative embodiment, each feed alley 30 is bounded on both sides by a feed fence 31. Each feed alley 30 comprises a plurality of feeding places or feeding stalls for the feeding of the animals 9. Viewed from the feed alley 30, the feeding places are located behind the feed fence 31. The feeding places extend substantially transversely with respect to the feed alley 30. The animals 19 stand with their head toward the feed alley 30 and can stick their head through the feed fence 31 in order to feed on feed which is deposited along the feed fence 31 by the feed wagon 10.

[0055] The feed fences 31 in the shed 8 are situated at a distance from the feed loading place 16 of the feed supply system 7. The feed fences 31 are each accessible from the feed loading place 16 by the feed wagon 10. In the operating area 2, various beacons are installed. The beacons are in this illustrative embodiment formed by strips 32 fitted in or on a floor or other ground surface, walls 33 of the shed 8 and impact points 34. The feed wagon 10 comprises a sensor system (not shown), which is configured to interact with the beacons 32, 33, 34. In addition, the feed wagon 10 comprises a gyroscope (not shown) in order to travel straight ahead over a predetermined distance. The gyroscope is connected to the control unit 15 of the feed wagon 10.

[0056] The feeding system 1 comprises a control system 35 having a memory 35a in which data are stored, such as navigation data, ration data and operating data. The navigation data comprise beacon data of the beacons 32, 33, 34. On the basis of the navigation data, the feed wagon 10 is capable of following various routes from the feed loading place 16 to and through the shed 8. The ration data comprise a plurality of rations for the animals 9. Each ration is determined by a total quantity of feed and the composition thereof, for example the total quantity of feed in kg and the recipe (ratio between different feed types) in kg per feed type. The operating data comprise, for example, operating data for operating the dispensing device 14 of the feed wagon 10. Although the control system 35 is schematically illustrated on the left in FIG. 1, the control system 35 could also be installed at another location.

[0057] The feed wagon 10 comprises a sensor device 38 for measuring the quantity of feed which is present along the feed fence 31 along which the feed wagon 10 travels. The control system 35 is configured to receive values of the measured quantity of feed along each feed fence 31. The control system 35 is configured to prepare a following batch of feed on the basis of the measured quantities of feed along each feed fence 31. The control system 35 controls the feed wagon 10 and the feed loading device 20 such that a new batch of feed is deposited before the animals 9 have completely eaten up the feed, i.e. the control system 35 guarantees that feed is always present along each feed fence 31. The feeding system 1 is thus fully, or almost fully automated.

[0058] The control system 35 is configured to generate an alarm signal if the observed quantity of feed of at least one feed type a, b, c in the feed supply system 7 falls below a threshold value. The threshold value is preferably set on the basis of the quantity of feed of each feed type a, b, c that is required for a ration. If the observed quantity of feed of at least one feed type a, b, c in the feed supply system 7 falls below the threshold value, this means that the feeding system 1 must be shut down in order to replenish the feed supply system 7. The alarm signal is, for example, an e-mail or text message to the user.

[0059] In the feeding system 1 according to the invention, the number of alarm signals, however, remains limited. The feeding system 1 according to the invention is configured to indicate the expected period of time until the feed supply system 7 is to be replenished, i.e. when the remaining quantity of feed of one or more feed types in the feed supply places 19 of the feed supply system 7 is less than the quantity of feed of said feed type that is required for a ration. As a result, the user of the feeding system 1 can plan better for the replenishment of the feed supply system.

[0060] In order to determine the expected period of time until the replenishment of the feed supply system 7, the feeding system 1 comprises a feed supply observation system for observing the quantity of feed of each feed type in the feed supply system 7. In this illustrative embodiment, the feed supply observation system comprises an observation device 36, which is fitted to the grab 24, in particular a laser or a camera, such as a camera for creating three-dimensional images. The observation device 36 is configured, for example, to measure for each feed supply place 19 the distance (cm) to the highest point of the feed which is present in said feed supply place 19. The observation device 36 is connected to the control system 35.

[0061] The grab 24 is controlled by the control system 35 on the basis of the ration data of the selected ration such that the selected ration is placed into the holder 12 of the feed wagon 10 while the feed wagon 10 is stationed at the feed loading place 16. On the basis of the ration data of the selected ration, the grab 24 takes quantities of the feed types a, b, c out of the feed supply places 19 to the holder 12 of the feed wagon 10 such that the selected ration is received in the holder 10.

[0062] While the grab 24 is compiling a batch of feed according to a desired ration in the holder 12 of the feed wagon 10, the grab 24 moves above the feed supply places 19. On the basis of the measured distance to the highest point of the feed present in each feed supply place 19, the control system 35 can determine the weight (kg) of the remaining quantity of feed in said feed supply place 19. After all, the height of the floor of the feed supply places 19 is known, so that the control system 35 can convert the measured distance into the height (cm) of the remaining feed in said feed supply place 19. On the basis of said height and the relationship between height and weight for each feed type (kg/cm), the control system 35 can then determine the weight (kg) of the remaining quantity of feed in each feed supply place 19.

[0063] The feeding system 1 comprises a feed consumption observation system for observing the consumption of feed of each feed type from the feed supply system 7. In this illustrative embodiment, the feed consumption observation system comprises a weighing device 37, which is fitted to the feed wagon 10 and is configured to measure the weight (kg) of feed which is received in the holder 12. The weighing device 37 is connected to the control system 35. During the loading of a batch of feed into the holder 12 of the feed wagon 10, the control system 35 monitors how much feed (kg) of each feed type a, b, c is extracted by the grab 24 from the feed supply system 7, and at what time.

[0064] Suppose that a ration of 200 kg of feed type a, 200 kg of feed type b, and 100 kg of feed type c (total feed batch 500 kg) is loaded into the holder 12. In this case, the grab 24 first grabs feed repeatedly from the feed supply place 19 containing feed type a. If the grab, for example, takes a portion of 60 kg of feed type a from the feed supply place 19 and subsequently delivers it into the holder 12, the weighing device 37 measures a weight increase of 60 kg. The measured values are passed on to the control system 35 and stored in the memory. The control system 35 therefore logs the observed values of the consumption of each feed type a, b, c over time, i.e. said values are registered and stored as historical data in the memory of the control system 35.

[0065] On the basis of the historical data of the observed consumption of each feed type a, b, c from the feed supply system 7, for example over a week, a month or longer, the control system 35 makes a prediction of the future consumption of each feed type a, b, c from the feed supply system 7 for a predetermined future time period, such as for the coming 12 hours. If during the past week, for example, a specific ration R1 has been made each day at approximately 5 a.m., this being stored in the memory as historical data, the control system 35 can predict on the basis of pattern recognition in the historical data that the same ration R1 will be newly prepared the following night at 5 a.m. This is represented schematically in FIG. 2, in which the vertical dotted line represents the time of making the prediction. Obviously, the historical data comprise large quantities of data of a plurality of rations over time, i.e. much more than the data which are shown schematically in FIG. 2. In larger quantities of data too, the control system 35 can discern repeat patterns. In this way, the control system 35 can predict the future consumption of feed of each feed type a, b, c from the feed supply system 7.

[0066] Subsequently, the control system 35 determines an expected period of time until each feed type a, b, c of the feed supply system 7 runs low on the basis of the observed values relating to how much feed (kg) of each feed type a, b, c is present in the feed supply system 7 and the predicted future consumption of each feed type a, b, c from the feed supply system 7. The expected period of time until each feed type a, b, c of the feed supply system 7 runs low indicates how long it will be before the feed supply system 7 has to be replenished. As represented in FIG. 3, the control system 35 comprises a display screen 39, such as the display screen of a computer, laptop, tablet or smartphone of a user of the feeding system 1. The control system 35 is configured to display on the display screen 39 the expected period of time until the feed of each feed type a, b, c in the feed supply system 7 runs low. The user of the feeding system 1 can therefore see with a glance when the feed supply system 7 will have to be replenished and can easily plan for this.

[0067] The risk is minimal that the feed supply system 7 runs out, i.e. that one or more feed types a, b, c are used up without early warning to the user.

[0068] Instead of or in addition to the representation of the expected period of time until the feed of each feed type a, b, c in the feed supply system 7 runs low, the control system 35 can be configured to generate an attention signal if the expected period of time until one of the feed types a, b, c is used up is shorter than a period of time set by the user, for example two hours. The attention signal is, for example, an e-mail or text message to the user. The user can subsequently in good time replenish the feed supply system 7 with the replenishing device 27. The replenishing device 27 comprises, for example, a silage cutter or other device, coupled to a tractor, which is operable by a person (not shown).

[0069] The replenishing device 27 shown in FIG. 1 is configured to automatically replenish feed of the feed types a, b, c in the feed supply system 7. The replenishing device is in this illustrative embodiment formed by a self-propelled replenishing wagon 27 having a plurality of wheels 41 and a drive and steering system for driving and steering the replenishing wagon (not shown). The drive and steering system of the replenishing wagon 27 comprises an electric drive motor and a battery system for storing electrical energy. The drive and steering system can receive navigation data from the control system 35 in order to travel autonomously from the feed storage 3 to the feed supply system 7. It is also possible that the replenishing device 7 is suspended from a rail which leads from the feed storage 3 to the feed supply system 7. In addition, the autonomous replenishing device 27 can comprise other devices, such as a silage device, and/or driven conveyor belts, which can be controlled by the control system 35 to move one or more feed types a, b, c from the feed storage 3 automatically to the feed supply system 7 (not shown).

[0070] The control system 35 is configured to control the replenishing device 27 on the basis of the expected period of time until the feed of one or more feed types a, b, c in the feed supply system 7 runs low. For example, the replenishing device 27 is configured to automatically replenish the feed supply system 7 such that each feed type a, b, c in the feed supply system 7 is replenished before the quantity of feed of said feed type a, b, c becomes less than a threshold value. The feeding system is hence fully automated.

[0071] The invention is not limited to the illustrative embodiment represented in the figures. The person skilled in the art can make various adaptations which lie within the scope of the invention. For example, the consumption of the feed types a, b, c from the feed supply system 7 can be determined on the basis of historical values of the measured quantity of feed which is situated along each feed fence 30, instead of on the basis of the measured weight of the feed accommodated in the holder 12 as a batch of feed is loaded therein. The decrease in the quantity of feed at the feed fence is a measure of the consumption of feed at said feed fence, and hence the consumption of feed from the feed supply system. In this case, the feed consumption observation system comprises the sensor device 38 of the feed wagon 10, and the consumption of feed from the feed supply system 7 is indirectly determined.