how much would it cost to feed 25 chickens a month? I plan on growing a large garden,(14'X28') from which they can have alot of stuff, weeds, veggie scraps, greens, tomatoes that are a bit past it. So how much feed would that number of chickens go though? They will have a large grassy run, 14'X28' but no free range. I also have an old super productive apple tree that they can have alot of apples from in the fall. So will it cost alot to make sure they have all the food they need?