I have two dogs outside, Moose (a blue heeler/pit bull mix) and Ranger (unknown). Neither of them really pay any attention to the chickens when they are free-ranging. Except, Moose will likely lay down near where-ever they are. Of my two inside dogs, Coco (a shih-poo) could care less. He ignores them. However, Bandit (Boston Terrier), is a TERROR. We cannot let him out off leash or he absolutely terrorizes the chickens. Remarkably, I also have 5 outdoor cats, who also typically ignore my chick sweeties.