I've had to quarantine a white silkie rooster that I recently purchased. His glands along his beak are swollen to the point that his eyes could barely open, he has raspy breathing and thick yellow mucus was dripping out of his nostrils and bubbles in his eyes. I did start him on antibiotics in his water which has helped the swelling. He has also started eating again (he had stopped, but started again after I began dosing him with antibiotics) and isn't as listless. But, his breathing is not much better.
I don't want to put him down as he is super sweet, but I don't want him to suffer either. I don't know what he is sick with other than what looks to be a sinus/respiratory infection.