My 8 week old chicks and momma been sneezing. They all look healthy and act fine. Is it just a cold? Is that common? Do I need to do anything? Today was the first day I let them out for about an hour to free range. I haven't let them out with the older chickens. They are in a separate pen with the runs next to each other. I have seen some of the others sneeze some but not as much as these.