Dude, that's kind of a dumb thing to do.
Raw weed can fuck with his digestive system just like it does to humans. In case you didn't know, raw weed wreaks havoc with your intestines.
Dogs process just about everything different than humans, FYI.
ETA: In case you think I don't know what I'm talking about, you can go to my profile page and learn what I used to do for a living.