Hi everyone we recently found a hard, small bump on the tail area of my guinea pig. I managed to half peel some of it off before bringing her to the vets, and the doctor informed us that it was dried glandular material. It's a long story, but we weren't really able to ask the vet for details about it (we do know how to clean it though, she said wash her bum every week or so). I was just wondering if anyone knows anything about glandular material on the bum area? My main question is if it's normal for it to feel as hard as it feels. We have to go back for a hormone injection in about a week anyways but is there any prior help I can get on this? Thank you.