I'd have to agree with dogs as well. I lost three of my chickens in broad daylight to dogs. It makes me so mad. I own two Labs, one of which is a trained duck hunter. He knows the difference in the wild ones and his "siblings". My labs stay on my property and don't attack my neighbors pets, kids or anything else for that matter. If only my neighbors, kept control of theirs. Poor Evi, Betty & Henrietta! I miss them. Now it's only free range time when we are out in the yard.