I'm just wondering if anyone knows why hamsters pee in their wheels? I just don't get that. Does running in their wheel make them have to urinate a lot or something? For hamsters being such clean animals, as far as how often they clean themselves, you'd think they wouldn't pee or poop in their toys. Also why do they eat, sleep, pee and poop in the same place, their nests??? I don't get that either. Can someone please enlighten me on this! lol.