Poor dog. Valiant, courageous come to mind. That wolf could be rabid. The attack on humans is very odd and not natural. These wolves could be cross-bred (hybrid). In the northern part of Alberta there are some black bears that actually stock humans. This is a genic flaw of some kind and it is not the norm. Thanks for taking the time to post the photo. They probably tore that thing to bits in minutes if there were 5. Poor thing didn't have to suffer to long.