Wolves have very fluffy cheeks. Wolves have small, round-ish ears. Wolves have small angular eyes. Wolves have large noses. Wolves' tails are wide and short.

There are some extra traits you can pay attention to that will really emphasize the canid ordeal. Canids tend to have their neck sectioned in two with flat fur at the top and fluffier fur at the bottom; it can help to make these parts sectioned in your art. Wolves have different fur at their shoulders that can help to be outlined, this fur is usually a different colour to the body. Canids, like most other animals, have a 'tuck' at their belly; this is where the skin at the belly and haunch connect and the softer inner belly is behind it.

These tips are for if you have the basic body shape down, which isn't all too hard anyways.