A new chick production method and a new chick production system are obtained which are different from a conventional method in which all live eggs are collectively accommodated in a hatcher tray to develop chicks. The chick production method of the present invention divides mid-hatch eggs into a plurality of groups based on physical information measured for the mid-hatch eggs during a period from when the eggs are accommodated in a setter tray to when the eggs are transferred to a hatcher tray, and accommodates the mid-hatch eggs in the hatcher tray to develop chicks. In addition, a chick production system of the present invention includes a measurement unit, a sorting unit, and an accommodation unit, and the chicks are developed by each of a plurality of hatcher trays.

A tray supply device that reduces effort and burden involved in an operation is provided. The present tray supply device includes a tray storage unit, a detection unit, and a distribution unit. The tray storage unit is provided so as to correspond to one of a plurality of accommodation units that cause eggs to be accommodated in trays. The detection unit detects the amount of the trays stored in each tray storage unit. The distribution unit distributes empty trays to each tray storage unit in accordance with a detection result of the detection unit. An orientation change unit is further included, which changes the orientation of the trays so that the trays are accommodable in each tray storage unit.

A tray supply device that reduces effort and burden involved in an operation is provided. The present tray supply device includes a tray storage unit, a detection unit, and a distribution unit. The tray storage unit is provided so as to correspond to one of a plurality of accommodation units that cause eggs to be accommodated in trays. The detection unit detects the amount of the trays stored in each tray storage unit. The distribution unit distributes empty trays to each tray storage unit in accordance with a detection result of the detection unit. An orientation change unit is further included, which changes the orientation of the trays so that the trays are accommodable in each tray storage unit.