We got four RIRs a couple of months ago, they had pretty much stopped laying and we were just getting them to be companions for our last hen who was the sole survivor of a fox attack. I went to feed them and collect any eggs that might have been laid, and one of them was missing so I had a look in the coup and she was there lying on the ground dead... nearly two weeks ago the same thing happened to one of them, but I put it off to old age. There were no symptoms, yesterday she was out and about, not lethargic, or gasping or anything else unusual. could it just be old age?