They are sneezing. It might be from dusty conditions or sometimes dust in the feed. Chickens don't get colds but they can get a variety of respiratory ailments... If you're worried, for starters you can get some vitamin/ electroyte poultry vitamins from the feed store, to mix in their water for a few days. Just keep an eye on them while they're on the vitamins and see if it continues. If it does, it could be that they have CRD or MG. Both are treatable. Do they have any swollen eyes, or noticeable discharge from their nose or eyes? Are they eating well and do they look and act healthy? Good color in their combs, bright eyes? Are they sneezng just occasionally or is it something regular? Please keep us posted.
