There are not any other artists for ratties - I had a few but they just vanished after a while, got bored I think.
I really like the style and shading, my only issue is the structure of the rat. The back and legs are fine, but the head is a bit too small (the skull is actually the largest bone in the rat's body - primarily because the rest of the skeleton is collapsable) and the tail is really big. If you're having a bit of trouble with it, perhaps do you want me to sketch out a "frame" and you color and shade over top of that? I can do sketchy frames in a very small amount of time, it would probably speed up your time as well.
Overall, I do like it, it's very cute, my only issues are size/structure.