i have a d'uccle rooster. he has a really nice and clear crow or what ever it is called. for a few days it was not nice and clear. it sounded like he had a cold and he also sound like he was clearing he thoat a few times. does that mean he picked up a cold? this might be a really stupid question but i know they get sick and injured and infections and things. but can they get a cold like humans do and in a few days it goes away? like i said stupid question. if it was a cold what can i do to help him or any of my chickens not get worse and pass it around? is there anything i can do to help prevent colds?