I have a rooster that has been very sick for 3 days. I started giving him shots of Tylan 50 two days ago. He isn't better but he isn't worse. Both eyes are swollen shut and he has very labored breathing. He isn't eating or drinking. My question is, is it fair to him to keep trying or should we put him down? I don't want him to suffer but he has made it this far. Also, if we keep him alive and he gets over this will I ever be able to put him back with the flock or will he always be a carrier?