Milk sources are a variety of animals and plants that can be used to produce milk. Teats, ewes, COWS, soyas, dairies, coconuts, and UDDERS are all sources of milk. Teats are the nipples of mammals, ewes are female sheep, COWS are domesticated animals, soyas are a type of bean, dairies are businesses that process milk, coconuts are a type of fruit, and UDDERS are the mammary glands of COWS and goats. Goats are also a source of milk.