Wet-Tail: This is a deadly hamster disease. When a hamster gets it, it will die in 2 weeks if nothing is done. If one or more of your hamsters gets wet-tail, immediatly seperate it from all other hamsters and go get a medication from a pet shop. There are many brands that don't cure it, but you can be sure with Oasis. My hamsters have gotten it a lot, and only that one cured them. Symptoms of wet-tail are sitting in a crouched over position, walking with an arched back, the hammie not wanting to be held, not wanting to eat, laying arouns