When choosing a puppy, I automatically check the bite. So Bambi had a perfect bite, and so does Harley even though we didn't actually choose him exactly.
Delilah has a level bite (where the teeth meet) rather than the preferred scissor bite. Mouse had an overbite/undershot jaw when we brought her home. A month of eating raw however has really strengthened her jaws, because now she has an almost perfect scissor bite, I am quite amazed! I just wish I had before and after pics.