Ok, I have been doing some reading on respiratory ailments and I am still unsure of what my chickens have. 3 of them (pullets about 5 months old) are sneezing and occasional cough but not much else. The nostrils are wet but no thick goo, no eye discharge, no swelling, etc. They have been like this for about 2 weeks or so. Today I laced their water with a vitamin powder, and have been giving them tomatoes and apples and raisins in hopes the vitamin c will help. I have done no isolation, so I am expecting the rest to catch this eventually too. Is there anything else that can be done? It is about 48 degrees here and very windy and cloudy/rainy. Their coop is a small raised coop really just for sleeping in. They don't seem to be hanging out inside of it unless it's raining. I am thinking of making a windbreak (plywood) to help them stay out of direct wind.