Your sketchlines look great! The live-drawings are done nicely, good proportions and flow.
When rendering, don't get stuck up immediatly on the details. Flesh out the general forms and then dive in for the finer work.
Dare to use a bit more contrast in a couple of places, exp the eyes in the last paint.
I don't know how to decently paint fur, but I'm sure there are better ways then what you've done in the last one. (the wolf looks really flat)