Doesn't look like pecking. Diarrhea perhaps or even vent gleem. I'm not familiar with that stuff. I will tag a few more knowledgeable members. Hopefully they have an idea.
@Wyorp Rock @Eggcessive
Pictures would help. Bald droopy bottoms aren't normal. Sounds like you may have some feather picking going on. Droopy bottom could be internal laying. Pictures will definitely help.