I have runs built inside for each breed so they wouldn't be in the area I would install the fan. I just hate to cut a big hole in the wall and then not have a way to cover it for winter. Plus I am not sure how I can going to get the positive negative flow through the trailer if I do install a fan. I would prefer it exhausts out to draw air through the building rather than blowing on the birds. The reason being is that air blown from a fan further dries the air. If I am drawing fresh air through the building it would be healthier. I have one of those vents on my greenhouse that open only if the fan turns on. Of course it is useless right now cause I don't have electricity to it!
Hawkeye I just did a search and Valley Vet has denagard so I could get it in one day. Of course the shipping costs some but it still would arrive fast. I will definitely keep that in mind if I have any more colds develop. I found my tylan at Orshlen's. I bought the injectible because I don't like the idea of treating all the birds if I only have one or two ill.I understand you can give it orally as well but you have to have powder to mix it in water. It was only about $11 for the bottle which I really liked.

Hawkeye I just did a search and Valley Vet has denagard so I could get it in one day. Of course the shipping costs some but it still would arrive fast. I will definitely keep that in mind if I have any more colds develop. I found my tylan at Orshlen's. I bought the injectible because I don't like the idea of treating all the birds if I only have one or two ill.I understand you can give it orally as well but you have to have powder to mix it in water. It was only about $11 for the bottle which I really liked.