Sound of gnawing a bone [closed]
In his book The Plague Dogs, Richard Adams used the word...
scrrunshin'
The tod cracked a small bone and spat it out. 'Scrrunshin' bait's the bonniest'
...I thought he had made that up, but it may have come from..
scrunch
to make the noise produced by hard things being pressed together, or to press hard things together so that they make a noise:
Cambridge online