We keep chickens for the fresh eggs, and occasionally have some extra eggs to sell. The dogs can herd chickens as well, but they don't group together naturally like ducks do so the dog has to work hard to keep them in a bunch. As soon as you put a little too much pressure it's every chicken for herself and they scatter. The also will fly up to a perch to avoid the dog, which ducks don't do. The breeds we have are Light Brahma (the rooster), Ameraucana and Buff Orpington. The Buffs lay brown eggs and the Ameraucana lay green eggs. It looks like Easter every day with all the colors.