I Have sniffly chickens. I have treated them. I have read everything, and I mean everything about upper respiratory in chickens. I have not taken one of them to the vet. Here's the strange thing. They act perfectly normal! They eat like pigs. They run around and flap their wings and have fun. They dust bathe. The seem like nothing is wrong..but there are a couple worse than the others, and have a real snotty sounding noses. I have used Duramyacin for 7 days now. No change in anything. They are still happy chickens, just sound snotty. Sorry, but that's the best description. Does anyone think this will eventually go away, at least the symptoms. I realize once they have an upper R..they can be carriers. They are pullets, just getting ready to lay. I also realize, no eating eggs for at least three weeks. What about eating the eggs if they are still sniffy, and haven't been on the anti-biotic for a while? Can you eat eggs from a bird that is sounding like that? Not sure I would want to, but sure am hoping there is a possibility that this cold like symptom is like humans and it just takes about three weeks or so to go away! Anyone? Have this happen before, where a chicken is sick for a while, then symptoms go away? Then can eat eggs after???