I'm not saying your dogs are no good but people over here seem to think coon is not as hard for a terrier as our fox and your dogs can't be as good as ours if some were shipped over then we would all know for sure I personally haven't got a clue I've never hunted raccoons
I know coons use there teeth and claws to damage dogs, there is red fox in the states that people hunt as the native grey fox uses trees more than dens