Yak chews are apparently the shit...
My dog flips out over them, even when it's just an old one I found under the couch and he already has multiple out to chew on
Is that the cheese bone? If so, you're supposed to soak it and microwave. They puff up into a cheese bread cracker like thing. Pretty neat.
You can. But you dont have to.
Their saliva softens the part their working on enough, and whatever they swallow is still digestible