I have just got two female Russian dwarf hamsters. They were both in the same litter and they seemed fine together there.I brought them home and did everything I was meant to with the cage.They found their way to the food. However when they play in the wheel they both poop in there. I don't like to have to keep taking it off to clean the poop. What should I do? Also last night I kept being woke up by one of the hamsters squeaking. Sometimes it was just one,other it was reapeated 10 times. I looked over to see the one squeaking sat on the other. I don't dont is she was grooming the other one or not.Then the one squeaking kept running away. One sleeps in the wheel and one sleeps in the actual cage. They usually play together. But I don't know why they're acting weird.