Personally I would never feed anything raw of pork (no meat, no bones) to a dog.
There is a disease called Aujeszky's disease (or Pseudorabies).
The virus is not dangerous for humans, but if a dog gets infected, there is no cure. https://en.wikipedia.org/wiki/Pseudorabies
Boiling kills the virus. But boiled bones change in structure and can be very dangerous (splinter and/or obstruct).
