Also, they broke their wheel by chewing through a bit of plastic. They were left wheeless for a day, to give them time to think about what they did and the consequences of their actions. Or to give me time to figure out a way to fix it. I put it back together using a couple of paperclips and when I put it back in their cage Minnie jumped on it before I'd even had time to finish setting it up! Then Evie slept in it. I guess they really missed their wheel.
But this morning I saw both the paperclips have gone and the wheel is clearly about to fall off again. I had to leave so didn't have time to do anything at that point though. I wonder how long it'll take them to knock it down, and where the paperclips went. They wouldn't try to eat them, would they? Nah, they're too smart for that.