You need to work on lighting, doesn't look consistent.
Tounge and teeth don't have highlights or shadows.
There are some rough areas. Theres a weird bump on top of stroke. The stroke on the bottom covers the text. There are some white parts around the black stroke. Bottom of the wolf's chin, is a buttchin. It's causing weird point under chin stroke.
The text's atempt at making it look shine looks awkward.
You need to work on overall refining of your design.