Yes?

On my way home from a job this afternoon, I came across this squirrel that appeared to be gnawing on a stick. As I tried inching closer, it took off running with it in its mouth. As I tried again to get closer, it dropped it and headed up a tree. I discovered that it was a bone. I assumed it to be sharpening its teeth.

As noted in my comment below, I actually have a funnier shot of this critter.