We noticed one of our red sex link hens had a very wet, poopy butt, it looked like it was dripping. When we picked her up, there was a red, spongy mass protruding from her rear end. She didn't seem to be behaving differently than normal, or any differently than our other two hens. All three are at least a year old, one of them is about two years old, but we can't tell them apart, so we're not sure which one this is. We didn't notice anything strange about her earlier today or yesterday. She appears to be eating and drinking normally. We washed the area with warm water, but aren't sure what to do next. We're pretty new to the whole chicken keeping thing and would really appreciate any help. Thanks.