This is Rocky. She is a barred plymouth rock hen. I have five hens, however Rocky is the highest in the pecking order and always has been, I have never seen another hen try to peck at her. When I got her a year ago her bald spot was there, but it was no where near as big as it is now. After six months her bald spot finally filled up the area leaving only a small section of feathers between her anus and this spot (it has not grown since). This bald spot has always been more protruding on her body... If almost feels like silicone! None of the other hens have bald spots, only her (I'm assuming maybe its more common in her breed?). She has never shown symptoms of anything so I left it alone and nothing has happened. I know for a fact the feathers will not be coming back, as she has molted and none of them had reappeared or shown any signs of reappearing. Earlier this month I noticed the very center of the bald spot was bleeding, upon touch it seemed to be ice cold, though the rest of her butt wasn't. I wiped the area off and put vaseline on it, thinking it might help. Later that week the area seemed to have a small amount of pus on it. Once again I wiped it off and put vaseline on it. After that I left it alone as it seemed to have been getting better, however, today it once again got worse as i had found blood dripping down the injury. The temperature has been be below freezing but inside of their coop is a heater that makes this living area warmer, not to mention body heat from the other hens. The floor has hay and pine shavings on it and is quite soft, though Rocky sleeps on a small perch with two of the other hens a few inches off of the ground. Her appetite is as normal as it always has been as well as her drinking. - Is there anything I can do to help get rid of this bald spot? - Should I be worried that the bald spot is protruding on her? - How can I get rid of that little spot that keeps bleeding on her butt? Is it frost bite?