We, human beings have always majorly depended on two sources of food. The first source is food grown such as crops and agriculture and the second major source of food is livestock. Now, when you specifically talk about livestock farming, people either breed cattle, which includes cows, goats and all the animals, which basically have four legs and they are normally herbivores and mammals; or people are breeding chickens, turkeys or quails, which is basically categorized as fowl livestock farming. Now, if you talk about breeding or farming birds or more specifically domesticated birds then you need to understand that domesticated birds are not just a source of food for people but in fact, they are also a source of entertainment as well because many people hunt birds for fun as well. What other purposes do you think are there for farming or breeding domesticated birds?