I had a rooster was eating and drinking trying to crow and no noise. No coughing or sneezing. Comb and wattle were turning purple. I am assuming respiratory disease or gape worms not sure. I isolated him dosed him with tylan 50 and some Vet-x which was unsuccessful. Lost him after a week of treatment . What should I do if anything with the rest of my flock. He was in my serama area with mamas and chicks before I isolated him.