Highly Developed Jaws

In ancient times, ancestors of us dogs developed the ability to hunt in packs, making them more efficient hunters. Their jaws developed and became very strong. Dogs' jaws are still very strong. As human scientists have mapped the canine family tree, they say that the reason we dogs like to eat meat and chew on bones is simply that we have the tools for it. It is nice to have a scientific explanation, even though I do not need it to enjoy chewing on bones. I also urge humans to give their dogs bones to chew on, regardless of what they think about the evolutionary origin of this behaviour. We like it, enough said!