we've had our hamster Nibbles for 4 months (first family pet). at first, Nibbles used the corner of the cage as a bathroom, just like the hamster book said.
Then he started poo-ing in the hamster house but still used the corner to wee. now he does both in the house, then then sleeps on the stinky mess.
Is this normal for hamsters? Is there anything I can do to encourage Nibbles not to sleep on poo?