But I'm definitely not letting her into the run because I'm not sure what she'll do.My dog is only a puppy and she *loves* running circles around the run barking at the chickens. I let her do it because 1. She uses up her energy. 2. The chickens don't seem to mind (they always chase the dog from the inside of the run). 3. It's adorable to see my little cross-beak puffing up her chest and run around chasing the dog. And 4. The dog can't get to them.