My dwarf hampster always has a wet bottom. I called the pet store that i got the hampster from and they told me that the hampster had wet tail. I know what my hampster has but i have a few questions like, is it spreadable to the other hampsters sharing the cage, and how did she get it, and what i can do to get her back to normal. Can you please help me? Samantha Gdaniec Age 11.