My mother's border collie was fine eating bones his entire life until he was 10 and one got lodged in his intestine. Border collies are working dogs, not toy breeds. I would recommend never feeding cooked bones to a dog.
I've never ever heard of a problem with raw bones.
Also, no experience on this one but I've heard that if you feed raw food, you shouldn't mix it with store bought food. Something about the grains slowing down the digestion of the dog, allowing harmful bacteria in the raw food to actually have an impact.