My cavalier king charles spaniel is a raw dog too...and about 12-13lbs.
He has a little mouth and he can gnaw through anything Flip can.

I would definitely watch him, make sure he's not a gulper, and then let him have a go at anything he might like.
I started Jack on chicken drumsticks, necks and gizzards.
When I was comfortable with those, I moved to turkey necks, pork ribs, beef ribs, whole cornish game hens, chicken breasts, beef heart, chicken quarters, etc.
When I first started the little guy, I would hold the piece while I let him tear at it, just to be sure he didn't gulp.
Good luck and way to go on the raw thing!!
I still think it is the best decision I ever made for my boys.