some dogs, unfortunately, are just wired that way.
A buddy of mine has a Sheperd and hasnt had any of the issues like that yet.
I have had a Husky, a Collie, a mutt, a Newfie and now another Huskie and the only one I have been bitten in anger by was the mutt....
When he was a pup he chewed through a lamp electrical cord. We took him to the only 24 hour vet hospital. After a few hours they said he was fine, he had had none of the problems that can come from electrical shock.
Who knows, maybe?