I have a gravid corn snake who should be laying eggs right about now. It might be because she didn't like her lay bin, I don't know.. but anyways I think there is an Issue. I noticed a lump by her vent, and became concerned.. I changed the hide twice till she actually went in it of her own accord, soaked her in warm water, and bumped the heat up a little on her bin. I'm pretty sure she's going to have to go to the vet but I thought I'd post here and see if there's anyone that recognizes the issue and/or has any suggestions on what to try with her. I'm really not sure what that dark stuff is either, she was really feisty and wouldn't hold still for these pics.