Some help for you. :3
Hope this helps. Please correct me if I'm wrong.
1. The paws aren't very thick; unless you're trying to do a very realistic one, the paws do have a bit of shape to them. Try visiting Anuwolf's paw tutorial on DeviantART.
2. The tail is fluffy. :3
3. The top of the shoulder slightly pokes out at the top.
4. The back slants up, as you see it the picture, and connects the top of the head.
5. The back leg doesn't round sharply. It's more of an oval then a circle.
6. A dog/wolve's muzzle is long.
7. Same with #5.
8. The chest doesn't round sharply, either. If you have a non-fluffy dog, its chest rounds in like an oval. A fluffy dog just as fur everywhere, like the picture.
Hope this helps. Please correct me if I'm wrong.