Any advice would be appreciated. I have only had chickens less than a year. A few days ago, I noticed one of my RIR hens sitting under the roost when the others were outside, which is unusual. She got up when I went in and went outside but had a terrible limp and her tail is drooping downward instead of up. The next day, I notice when she stands, she leans on things and one side of her comb looked pale. Then I found two sacs with eggs in them under the roost where she had been hanging out. She is still eating but today her comb looks to be drooping over. I felt her abdomen and crop and neither seem overly firm to me. This hen is nearly a year old but I have no idea as to her egg laying ability as I have 8 hens of laying age and all but one are brown egg layers. I feed commercial lay ration as well as black oil sunflower seeds (handful now and then) plus some fresh fruit and veggies and occasional yogurt. They also free range and I do have a rooster. Is it possible he got rough with her and hurt her back?