This is really cool, I especially like the design of the head, though I have a bit of criticism, in hopes that will help you improve.
First of all, the paws look kind of weird. I'm aware that disproportionate body parts are considered cute, but it doesn't really work well for the paws and now they kind of look odd and unfitting. What I would try is size them down a little and make them more dynamic in relation to the leg, to make more one, instead of looking so separate.
Secondly, the shading on the side looks a bit off. This one isn't very noticeable, but still quite present. I think it would have looked better if you let the lighter shadows cover the face a little more, instead of the small spaces between the shadows spaces that are there now.
All-in-all still really good looking, keep it up.