I was recently contacted by an old timer getting out of running poultry strings at the state fairs. He had 20+ breeds of chickens, and I got a trio of Blue Orpingtons. When I went to pick them up, the conditions were deplorable. All of the birds were kept in 4x4 stacked cages 4 courses high inside a building, with recycled billboard plastic draped over the outside to keep the light out (apparently, to keep their feathers from bleaching). Anyway, all three Orps were showing signs of ammonia irritation: swollen faces, raspy breathing etc. None of them had snot or pus. All of the birds were also NPIP certified and had been vetted to show at recent fairs. I decided to take the birds as more of a rescue mission once I saw their living conditions, and after only 4 days in quarantine on pasture the swelling has gone down and their eyes are looking better. My question is, should I give them some Tylan just in case? I don't like to use antibiotics without just cause. There is still no sign of infection, no pus or anything. However, their breathing sounds raspy and the rooster's crow sounds off. They are all eating, drinking, and acting normal. They even responded to treats, which I am guessing they never had before. What do you guys think? Antibiotics? Or no?