I have two dogs. One is one year old a yellow lab mix. She's about 35 pounds, all lover, will follow you around anywhere. My 7 year old black lab/border collie/mutt is a protector and alarm system. He watches the cows in the pasture near us and guards the house and shed. He has even gone after someone running towards our house. So far this year they have killed numerus small coons, one adult coon, skunk, possums, even wild birds. I have yet to have anything break into my coop. Now if the chickens got out of their run i dont know how they would fare with the pets. Who all has dogs that keep your yards predator free?