We've got 15 (now) Rhode Island Reds - 9 that are almost 2 yrs old and 6 that are just over about 14 months. In the past month we've lost 3 of the younger hens. When we go out into the coop in the afternoon they're laying partially on their side and hardly able to move or stand up. Looking for ideas on what this can be and why it might be affecting only the younger hens. I had one that this happened to back in February or March also. All have had a little pasty feces on them but nothing that seems out of the ordinary. No visible signs of injury either.