I got some BO chicks in a trade, lost 4 , 3 pretty quickly one of the older ones later and one of the smaller ones is hanging on. She has the "gasping" crusty nostrils and watery/bubbly eyes. I treated her with Tylan for a week and she looked a lot better except her eyes still looked swollen. Today she is again bubbling at the eyes and looking worse. Any other suggestions? I have Terramycin , Detho something, Tylan and Terramycin ointment.