No magic in a deer bone. A spoon would work as well. But if you're determined to use a bone, here's what you do:
Go down to you local butcher. Ask for a beef leg bone..."for your dog".... Hang it is the sun for a couple of days--the yellow jackets will strip the meat.
Saw it lengthwise. Don't try to break it--it will spiral fracture. Scrape, file, and sand it ( I run up to 5000 grit Abralon) to shape and smoothness. Polish with white tripoli or even Bon Ami.
Better than any deer bone.