Two of our Hi-lines, about two years old, were dead in the coop this morning with what looks like a torn and exploded butthole. Other than looking rough due to molting they had no other obvious symptoms. Observing our other birds and animals, I find no concerns. Their back ends seem intact and just as fluffy as ever. Everyone is up and about, scratching and pecking, drinking and eating. We had 23 hens until these two died. I haven't found bloody poop. There is some runny, but I find that from time to time. They're in an open pasture with 2 sheep and a turkey hen. I appreciate any help.