I would stay away from raw hide all together. We buy a veggie based bone that looks like raw hide but a whole lot safer. They are called "Smart Bones". We get the peanut butter flavor and our boy loves them!
I am kicking myself a little bit right now but it's too late. I will give smart bones a look. Thanks for the tip.
Probably just going to take him to the vet asap. I don't want his tooth to get worse. I know it might be OK for a while, but possibly will spread.