Stunkz and Chippunkz have distinct heads and torsos, so it is easier to imagine that they have some means of hoping locomotion. Ratz too, have a separate head and body, although it is difficult to make out in intact specimens.
Then again, fuzzles to rest on a highly mobile appendage- their jaw.
Though with the rats I dislike the way their leg connects to their body- there is no fluidity, as with the attachment of their tail. I love the pictures of them resting, with their toes poking out from underneath the body, it works. But standing up, their leg seems to be simply stuck to their underside with no leg musculature in the torso.
Basically, I would have its arse redesigned.