Aprox. 5 days ago, my husband had a friend bring us some new young chickens, were all supposed to be female brown egg layers. The chickens are white, some with black specks. Don't know if that matters. I put them in a pen alone. Our other chickens free range they are brown banthams. I noticed that the chickens smelled bad when he brought them, but just attributed that to the fact that he said he had kept them in a covered horse pen with a light. Then about 2 days later, I noticed one of them coughing and sneezing. I called the vet who doesn't know much about chickens, but he said to isolate it, so I did and went the next day and got some tetracycline as he suggested. Wasn't sure about doseage because it was in mg. The closest I could figure was 1 1/2 tsp per gal. The bag said 400-800mg. Dont know if I got it right or not, but have been treating all new chickens with this in the water. About 2 days later the isolated chick died in the night. She was wheezing, sneezing, fluid in nostrils, yellow runny poop, but was eating good and drinking a lot. Then the next day I noticed my favorite free range rooster (bantam) was just standing not being active as usual. Closer look, he had yellow fluid in his nose and mouth and would not eat his favorite treat when I tried to give it to him (pasta). I put him in a big cage on the porch and started treating him with the medicated water and called the vet again, the assistant said to put 1 capful of Wazine in the water also, so I did. He is not drinking much that I can tell or trying to eat much. His eye became matted, but today is better and open, is not sneezing but coughing a little, standing still a lot, yellow runny poop, doesn't smell that I can tell. Don't know what is wrong but I am worried about the 2 African male geese we have had for years, one of them is fairly old and I don't want them getting whatever it is. I'm also worried about the other free range chickens getting it also although none of them have showed signs of sickness yet. Scared my rooster will die. I ordered some Corid 9.6% online but haven't received it yet. I read about it on one of these posts. Please help me, I have spent hours on this dialup trying to research this and am not sure what it could be.