I am new to keeping chickens. I have ten, 7 month old, hens left. Three have had the same symptoms, but at very different ages. All three came from the same breeder and were about the same age, but different breeds. The first one was just a chick. I put it down within about two weeks of its arrival. The second was about three months old. The last was seven months. The symptoms were a chirping along with a sneezing sound. Seemed to be trying to clear their nostrils by wiping on ground or feet. All three were gasping with open beeks. The last one became partially paralyized and unstable. (I put the other two down before they reached this stage, but the second one was experiencing the paralysis.) It then just went down and died. I went to Just Ask, paid $30, and basically had my observations confirmed from a vet in Scotland. Diagnosis was viral and the Maran either made it or she did not. Has anyone else seen this? I'll bet this was not uncommon.