I bought him from the Lucasville chicken show. He was okey when I brought him home. Now he sounds terrible. I started him on Sulmet last night and put him in his own cage. Is this just a cold. His other owner kept him in a pin. He showed him in the show. I have let him be free range since I brought him home. Can this be contagouis? He acts fine other than the way he sounds. How long should I keep him on the antiboitics? I plan to keep him caged and on it for 10 days so that I can monitor his input on food and Sulmet. Any other advice?