Hi. I have 4 chickens that have been showing signs of a cold. They sneeze a little,but not much, and they wheeze when they breathe. My friend's chickens and ducks had the same thing a few weeks ago and she treated it. She said it was an upper respiratory infection, and I believe it is too. My other birds, ducks and more chickens, aren't really showing symptoms except for sneezing, but that doesn't happen very much. What is the medicine I can get to treat this? And also the chickens get something like the hiccups and I don't know what it is. Thanks!