I just got a polish cockerel yesterday and he had an awful lice problem. I gave him a bath with flea shampoo and dawn and scrubbed him down really good. I noticed he is also sneezing but his nose doesn't really look very runny. Should I hold off on giving tylan until I know for sure if he has a respiratory problem or should I give it to him now as a precaution? I also noticed what feels like an air sac in his chest area, kind of like an inflated balloon. It didn't feel like his crop it was over to the side of it. Is this normal? My other two are silkies and I haven't really noticed anything like that on them.