I have no idea what was wrong with my pour chicken. She seemed depressed, not energetic, the other chickens were avoiding and pecking at her, and what made it worse was that it sounded like she was purring and having trouble breathing. She died within the week of getting her and was a d'uccle. I was wondering if it was a breed specific disease, or if it could have been viral, bacterial, and how to protect my other d'uccle and the rest of the flock. Can anyone help?