Critique-wise, I'd focus on constructing the muzzle based on solid forms. While the inking itself is nice, the parts look kind of weirdly twisted in shape, like her nose and mouth are bent to the left. Also, her right fang reads as if it's directly below her nose.

I'd recommend Preston Blair's "Animation," which is available from the links at http://www.cartoonbrew.com/animators/preston-blairs-animation-book-1820.html - whether you are interested in that style, it's a good primer for how to construct body/muzzle forms and treat line of action to make character construction fit together better.