Feathers are the outer covering of all birds. They do much more then just allow our pigeons to fly. To a degree they shed water and they keep our pigeons warm in cold weather. They like human hair are mostly protein. Unlike human hair are replaced each year. If a person stops to think about it he would soon begin to realize the importance of diet. Once you understand that the pigeons are always shedding year round and we know this because we can see the small fluff feathers in the droppings. We then would want to be sure that the diet of our pigeons contain all of the amino acids, minerals and vitamins that would be needed to grow the new feathers.