I have owned German Shepherd dogs for 31 years. I have never had a problem with them hurting my chickens (or any other animal and that includes baby squirrels, parrots, cockatiels, rabbits, pet rats and other animals). I did get all of my German Shepherds as puppies and taught them not to hurt any animals. German Shepherds are extremely intelligent and only want to please. P.S. Not sure if it matters, but all my German Shepherds were and are female.