Cool! Only seen wolves once when I was down a hole and heard barking and baa'ing. But I didn't have any bones with me.
But I'm glad I'm not the only environmentalist who plays. I tend to build my structures into the landscape, replant extra trees, fill in holes, kill only the bare minimum of animals, etc. I think almost all of my shelters have been modified caves or holes in cliff faces. Current home is up in the trees on top of a mountain.
And yeah, like the others have said, if you go outside in the morning you can usually find tons of bones, feathers, and arrows just lying around the landscape.