All, I’ve never seen this before in lots of years with hens. Our Welsummer hen is noticeably breathing using muscles in the neck/?? not sure, but I think it might be that neck air sac expansion and contraction is very obvious. The rest of the flock is fine/ not showing any similar signs. In general I think this hen looks a bit puffed up, and her eyes seem almost half-closed. She is the last survivor of 5 same aged pullets we purchased about 6 years ago. She has not laid for a very long time. She does not appear to be suffering, struggling to breathe, etc. No odd sounds, no discharge, no sneezing or wheezing. Yet I am quietly thinking she may be near the end. She has been under some stress- we moved a few months ago and just last week replenished our flock -were down to 2 and did not want a lonely lone hen when the next passed (and we were in need of more eggs). This Welsummer was used to a grumpy production-style Buff Orp companion, and we added 4 very gentle bantams (2 pekins and 2 rocks) and 3 fairly docile very large young pullets (a white Rock and two English style Buff Orps). Pecking order discussions seemed resolved very quickly without fuss, with a pretty egalitarian, live and let live vibe. Everyone seems to be eating and drinking without conflict. Still, I am sure our Welsummer is intimidated by her huge new coop-mates. Thoughts? The half-closed eyes, for increasing amounts of time, were a sign of nearing the end for our previous older hens. The expanding neck has me especially flummoxed.