We have a 4-month-old lab puppy, and he is very 'exuberant' with everything that comes near his mouth. He is not allowed to have contact with my chickens. He is somewhat jealous of them, and when I'm in their run with him, he looks right at me and does naughty things like digging up plants or chewing on the extension cord. He likes to walk alongside the run and stalk the chickens then pounce and watch them scatter. He does get reprimanded for this, and sometimes a swat too. Given my lack of knowledge in dog training, I think my chickens will be safer if they stay out of his reach.