Raw feeding: chicken bones?

So I just started weaning my 8 week old french mastiff pup on raw food. I'm starting him out with chicken for a week or two. I know that everyone says dogs need to have a certain percentage of bones in their diet to be healthy. And I also understand that raw, uncooked bones are much more flexible than cooked and you should never feed cooked bones. But this is my concern- While I was preparing my pup's meal I was just playing with a small chicken bone from a thigh. It was pretty soft but when I broke it, the ends were wicked sharp! I'm just terrified that one of those bones could internally hurt him. I don't want a sharp bone to pierce through the lining of something in him. But I know they need bones in their raw diet. Someone please help!