I have several 8&9 week old pullets that I put out for one night in the smaller coop two days ago. It is wrapped in plastic so no drafts, but the ground is very damp due to massive rains. The next day one had snot on her beak. So I put them back in the crate in the big coop that is insulated. Now three are sneezing, but they are eating and drinking. One is puffing up her feathers a bit.. I have vet RX which is supposed to be for respitory,but I decided to check here as I am such a newbie. Especially to youngsters.