If you do not have a slow cooker, a Dutch-oven (similar to this recipe) in a low oven does the same thing. Yes, it does take 8-8.5 hours but set it in the morning and you don’t have to mess with it at all.

We’ve made this with bone in and boneless, and the difference seems to be that the bone-in takes slightly longer to get shreddy, and has a bit more flavor. You do need to remove the bone before shredding.