I need advice on my rooster Hal. He has some kind of respiratory thing going on. I first noticed two days ago that I could hear him breathing when he was shut up at night with the girls in the henhouse. Then I heard a few sneezes from him and two of the girls. I have read all the posts and the links on the respiratory ailments so I got some terramycin and put it in their water. I also put some poultry vitamins on their oatmeal. This morning the girls all seem fine, but Hal still sounds terrible. His breathing is like a squeaky door. His eyes are clear, no runny nose, he is eating, and moving around like normal, but he is sneezing/coughing. He also didn't crow and that's a bad sign I think. I have kept him and girls shut up in the coop for the last few days due to the bitter cold and it is very dry in there, warm and not drafty. His symptoms are all very dry sounding, not wet or mucousy. He is about 10 months old and a very dear roo. I would hate to lose him. Please any advice? I am about out of ideas. Diane