I've noticed my chickens sneeze from dust in the air or getting water up their nostrils, but lately i've noticed one of my chickens sneezing for no apparent reason. She sneezes usually twice in a row (when she hasn't eaten or been in dusty areas for a few minutes) and she has sneezed out some moisture on occasion also. does she have some kind of cold (the weather is cooling off here), and is there anything I can or should do about it? Should I be concerned about her passing it on to the other chickens?!