I have a Lab, a Rat Terrier, a Carolina Dog, and a Chow/Shepherd mix. All want to eat my chickens and up until my dying breath I wil do everything I can to keep them seperate. My dogs are hunters, farm dogs, and free range and it is their job. The chickens are just vermits waiting to be killed. They do not understand and never will because their instincts override my wants. I have been training dogs for years in most disciplines and I wish you lots of luck trying to make them all get along. Small breeds were bred to kill small animals. It is just nature and has nothing to do with you.