I have a hen with a droopy bottom. It really sags, almost touching the ground. Now she has a a big droopy spot between her legs that is without feathers and is raw. She is about a year old. She is a cross between a black star and a rhode island red. She is alert and seems normal in all other aspects. She is the only hen that the rooster is not mounting though. All other chickens look great and seem very healthy. I know that the simple thing to do is to cull her, but I will give her a chance if I can treat her in some way. Please help.