Have any of your hamsters chosen a unique area/item as their litter pan? Zoey showed no interest in litter training and did her business everywhere. Then I bought her a beautiful wooden house and she chose the ROOF as her litter pan. I washed it well and put food on the roof, hoping to discourage her from using it as a litter pan, but she refused to eat the food. Finally, I said, "Ok, sweetie, the roof it is!"
She's Zoey, the 'potty' trained hamster, poopin' on a roof.