I had a hen rip out her vent. I didn't notice it until her comb turned orange and she was limp and looked almost dead. She is my dd's pet chicken. I couldn't put her down so I just washed her off and put her in the coop. Her vent turned into a hard lump for about 2 months. Just a few days ago I saw her in the nesting boxes. I looked at her vent and it was all soft and pink. It looked like nothing ever happened to it. At the worst of it I even showed it to a vet who thought it was hopeless.