Hen, about 2 years old. Lives on a diet of peleties, chicken food and homemade mash and fresh greens. Lives with 2 other laying hens of different varieties. in a small backyard garden. Their living space is surrounded by woodchips and various stages of compost piles. Before this, she was laying regularly. The rest of her behavior is normal, apart from being resistant to being picked up. But under her stomach area is very red, inflamed, has lost many feathers and looks painful. Almost looks like there are eggs trapped inside her. Pictures are attached, please respond if you have any insight! Thank you!