They like to hide in him down, especially because he has two outputs and they can turn round so always beautiful, by chasing each other etc.
sleep it can be in there also super;)
The two levels are also easy to reach for them, since they are arranged in stair shape, so to say, if I put up treats (not really to give, rather than filing out of laziness) is a high probability that they are either down or even were aufgefuttert.
In addition, even all 4 fit simultaneously it: D
Conclusion: my animals have a lot of fun, but housebreaking should not be a problem;)
The only, they have already managed to demolish the attached toy ball, or to gnaw, I did not get out. But for me personally, that's not so important.
