I've personally seen Boxers in fights. They're amazingly determined to hold their grip and not give up, regardless of taking punishment. They are second only to fighting specialists in this regard. Wolves, on the other hand, obey the ordinary laws of animal behavior like any other wild animal, and will seek to avoid and/or minimize injury. Gripping dogs have been intentionally bred to disregard this instinct, and will take extreme injury while maintaining a grip. This makes them a special case among dogs. Thus, as I said, were a Boxer-sized dog in good condition, belonging to a gripping breed, able to acquire a hold, a wolf would likely rethink his choice of meals.
Could be, however, that dog-hunting wolves are extremely adept at gaining the advantage from the start, thus preventing such a dog from acquiring a grip. That's a different question, and one to which I cannot authoritatively speak.
What part of killing other canines don't you get? Are you just that [bleep] dense? Wolves are in the business of killing ANY other canines. They do not tolerate them. Wolves kill other wolves as often as or probably more often than they kill dogs. Even a few days away from a pack can be a death sentence to a wolf that tries to return. Wolves are adept and practiced at killing other canines, large powerful canines (wolves) that are adept as well at killing. Wolves do not get to be adult wolves without becoming expert at killing. They are not vegetarians and nobody, not even the wolf lovers leaves food out for them in case they aren't so good at killing. If they aren't good at it, they die. I don't know for sure, but my guess would be the largest mortality factor for wolves is other wolves, at least up until very recently when we started killing them again.
