Birds can lay eggs without mating, and hens can lay eggs without mating with roosters.

Hens don't mate with roosters, and the eggs they lay have no sperm. Chickens can't hatch, so they can only eat them. Therefore, if the chicken farm raises laying hens, not breeders, such hens do not need to mate.

Eggs before fertilization are called azoospermic eggs, and chickens cannot hatch. The egg after mating is not necessarily a fertilized egg. If the mating time is too long, the eggs will be laid soon, and the chickens will not hatch at this time. Only mated fertilized eggs are useful and can hatch chickens.