Hello everyone! My guinea pig recently developed some sort of growth on his stomach. It is black and can be flaked off. When i try and get it off with a q-tip he doesn’t seem to mind it. However, it’s much too stuck to him. I am wondering if this is serious or it I can treat it with some antifungal sprays. I clean his cage once a day but when I’m not home he sits in the same spot where he poops! Please offer any advice you have.