I have chickens from 4 months & down. A few days ago we had heavy rain for 2 days now some of my chicks the 4 month olds are sneezing some have stopped but some still are & there has been no discharge from nostrils until today one of the younger ones that is a pet likes to be held while I was holding her she sneezed & clear watery like came out. Could it be a cold? What should I do? There are no other symptoms.