I have some 4 week old chicks that just started sneezing. They don't seem to have any runny nose or eyes. They eat and drink well and are active. They've been on the same litter from the beginning. Nothings changed except the sneezing. I'm not sure if they just have a cold or what but was thinking of giving them duramycin-10 just in case they may be developing a respiratory problem that could become serious. If it wouldn't hurt them, why not play it on safe side and give it to them. Am I wrong in that thinking?