As a subject matter expert in animal biology, I can tell you that chickens do not produce milk. Lactation, or milk production, is a characteristic of mammals, and chickens are classified as birds, not mammals. Mammals have specialized mammary glands that produce milk to feed their offspring. Birds, on the other hand, lay eggs and do not have mammary glands. Instead, they provide nutrition to their developing embryos through the yolk within the egg.

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Pigeon milk is extremely rich in proteins and fats. When it was fed to chickens in a 1952 study, their growth rate shot up by 38%. A few other birds, like flamingos and emperor penguins, also produce crop milk. Yes, you read that right: some cockroaches feed their young a kind of milk.read more >>