The only "pork" bones that should be given is the larger HAM bones - porkchop bones will splinter and choke the dog - please don't give them smaller pork bones.
I would be careful too and make sure there isn't too much meat on it. Pork and ham isn't really good for dogs, it won't kill them but it at least upsets my girls tummys and gives them the runs. I agree, only big bones should be given not the little sharp ones from porkchops.