@Heather-Boyd I love the boxy style. I had a couple minor things that might improve it.
The line on the snout look like shadows from the nostrils. Unfortunately, the light source is from the other direction... so they shouldn't be there. (Was just bugging me.)
The tail feels like something is wrong with it. I think that you tried to have it coming to his side. But it kind of looks like the perspective is off. I think I would recommend straightening it out or make it loop around more?
I absolutely love the face and expression. Definitely do more in this style!