I bought some chickens just after Christmas, who have been in a separate pen from my other chickens. I was getting ready to start intergrating them into the main flock in another 4 or 5 days. I noticed a few days ago that one the the chickens was sneezing, and my son noticed the same chicken sneeze yesterday. I had a good look at her, no nasal discharge, no other signs of illness. Could it just be dust getting up her nose? She is a rather vigorous dust bather! No other chickens are sneezing. Should I hold off on moving the new chickens into the main pen?