I was delayed to work by a couple hours today because of a bone...

Last night noticed my rear left tire was quite low low. First thing I did today was take it to Les Schwab tires to get fixed. Turns out they found a bone, apparently this is a bit more difficult to remove because it just keeps breaking, unlike a nail or a screw which would just come out in a piece or two from what I would imagine.

This just brought more questions for me. What I want to know is what kind of bone was it? Cat? Dog? Rat? Bat? Bird? Human? Otter? Nutria? Squirrel? Fish? Other? Was the bone part of a foot, a wing, a hip, arm, pelvis, maybe a claw? Am I responsible for the death of the critter who's bone had punctured my tire? If not how long had it been dead and did it meet it's death by the tire of another? How long had it been dead? How long had the bone been in my tire? Did the bone come from the freeway, a grocery store parking lot, side street, or maybe the parking lot at work?