Chickens can safely eat goat feed but it should not be their main source of food. In order to stay healthy, chickens require a diet nutritionally balanced for their species.
To decide whether it is safe for one animal to eat the feed of another animal, we have to know what both animals eat naturally. Chickens are omnivores (i.e. they can eat plants and animals).
Goats are not just herbivores, they are also ruminants. Ruminants are animals that possess an organ (called a rumen) in which bacteria ferment what the animals eat, and give nutrients to the animals.
How Do Both Animals Digest Their Food
Chickens are not ruminants, so they do not have bonus proteins like goats.
As Omnivorous birds, Chickens can eat both plants and animals. The feed of goats are made of ingredients from a plant source, therefore, chickens can eat goat feeds.
Feeding grains to chickens is okay because the number of indigestible nutrients in grains is low when compared to hays. Grains make a better supplement to feed chickens than hay