The invention relates to a method for producing chicken at a hatchery, the method comprising；incubating a batch of eggs in an incubating device during an incubating period of between about 7 to about 20 days, and then,for each egg of the batch, detecting the presence of a hatchable chicken embryo,based on the presence of a hatchable chicken embryo, dividing the batch of eggs into at least a hatchable batch portions and a not-hatchable batch portion,hatching the hatchable batch portion until hatching occurs,rearing of chicken hatched from said hatchable batch portion,wherein the method comprises at the hatchery processing the not-hatchable batch portion into feed and administering said feed at the hatchery to hatched chickens during rearing.
