I'll just start off with the basics.
Things done well in this piece:
-Proportions; The proportions look amazing to me! Especially the front legs and muzzle.
-Apparel; I just love how the bracelets look on him! They somewhat match his colors.
-Ears; Look at those ears. He looks like he's pulling off an "I don't care but I'll listen" aura. Great going!
Things to work on:
-Back leg proportions; I have to agree with Koi. The back legs do look a little funky.
-Colors; The colors just don't settle with me. I've never really liked blues and very grey greens together. It just doesn't look right to me. I also don' think that striped bracelet fits with him. Maybe a duller color than yellow would've looked better. The bright color just clashes with him. But I love the browns on him!
-Shading; Now I am no expert on shading, but I feel like there should've been some more shading on the body. I can tell where the light source is coming from, and I think some shadows have gone missing.
Well, that's just my opinion. Don't let this get you down!
-Your friend, Darkfury1087