Since it's been colder here in Maryland, I have noticed that MOST of my chickens have runny noses (I only have 7 btw), one also appears to be sneezing. Other then that, there are no other symptoms. They all seem to be eating and drinking just fine, all are bright eyed and otherwise healthy happy chickens. Should I assume that they have some form of CRD and treat or is this nothing to worry about? It has been going on almost a week now with just the runny noses. It is definitely not just water, as i wiped some of their noses to check. But it is clear, no yellowy color to it that I can see.