My 1 1/2 year old Rhode Island Red Rooster crows like he has a sore throat. His crow is weak, like a young rooster learning to crow. Sometimes his breathing is heavy and he makes a gurgle sound--like his lung has been punctured by a steel spur. He is the only rooster on the farm and has not been in a fight. He is very active in chasing the hens every morning. What could be wrong? and What do I need to do?