I got two new chickens, Rhode Island Red hens, full grown and one had a runny nose and sneezing - the smell from the nose was real bad. The other one just had the clear liquid from her nose, but no smell and not piling up with gunk. I did the Duramycin-10 for 24 days - 1/4 teaspoon in gallon of water to all four (includes my rooster and hen I've had for a year). They got better, but not well, so I stopped and then the feed store said I should not follow the directions, but put a teaspoon because they don't drink the whole gallon of water - that is for chicken houses???? So, I just stopped to see where it would go. Then, after five days, they both started getting sicker again. Got the shot Convenia for both of them 9 days ago, got better, but not well. Now, I have Tylan50 and I'm wondering if I should do that? The wheezing is not back yet, but the one still coughs (dry, not wet) and the other still has a little runny nose. They say Convenia is for 14 days, but that's for dogs and cats that don't poop as much. If they aren't well by now, should I go for the Tylan 50? It seemed like a cold/respiratory with the wheezing, but that corzya or whatever it's called someone said had the bad smell. There are not any other symptoms. I spent $75 at the vet the first time, she said the only way she could tell what it was is if the hen died bring her back for an autopsy. Went back and paid another $32 for two Convenia shots. Now $15 for plenty of Tylan. My two are still doing fine, but it's been since March 17th I've been doing this - since I got them for my birthday. QUESTION IS... 1. Should I wait 14 days for Convenia or do it now (days 9/10) before they start getting worse, because they have not gotten all the way better. 2. Should I do Tylan50 1/2 cc once a day for 3 days as injection or down the throat and should I just do 2 days since they've been getting so many antibiotics already? 3. With those flu-like systems can it be corzya (spelling) or because of the wheezing (and it getting better with antibiotics) it is probably just respiratory? 4. Should I do the same treatments to my two that are well? VETS HAVE BEEN NO HELP HERE - please don't tell me to go to the vet - I've been twice. The hens are obviously not dying or they would be dead already. Husband has given me this one last attempt to cure them. THANK YOU SO MUCH!