A lone wolf or 2 can't fight a bear (it'd be beyond dangerous for a whole pack as a bear is far stronger and heavier, a well placed strike could kill a wolf) and wolves flee from humans rather than fight - unless they're sick (e.g. rabies erodes the natural fear as the brain is eventually damaged), starving and desperate or see no other option at all - especially this much. Plus, wolves would regard a domestic dog as as immature and not an equal.
I liked the composition with the text and pictures, but the presentation of wolves as animals is WAY off.