That hog in post #1 looks like one tough old *******. I haven't really thought much about hogs in Canada, but I understand they are one of the principal prey animals of Siberian tigers, and I've seen video of a fellow hunting them in the snow in Germany. I guess there is no reason they couldn't survive north of the Medicine Line.
I've never seen one like that one, though. Wild hogs are plentiful where I live, in Florida. Most that you see in the woods here are lean and solid black, with very much elongated snouts and generally pretty smooth coats. That one in the photo from Edmonton is the hairiest hog I've ever seen in my life, as if he rooted his way right out of the Pleistocene. In my experience, our local hogs are wilder than deer, and almost as agile. I try to be cautious when they may be about, but I did walk up on a bedded sow with a litter of about eight very small pigs one time. Mama jumped up and ran away as fast as she could, abandoning the little ones to their own devices, although they did get up and run, one by one, in the direction she was headed. I don't doubt that some sows are protective, but I don't think that legendary fearlessness is universal. When they know humans are present and watching them, they normally head for cover at a dead run... At least in my experience.
I think hogs adapt very quickly. Wild hogs in Florida supposedly descended from domestic stock ( and I have seen a few red ones), with very little true "wild boar" influence, but they reproduce so quickly I believe dominant genes may take over within a very few generations in the wild, which might only take two or three years, or even less if the feral hogs are breeding with the wild stock, as I'm sure they do. This, I think, explains why they are so typically black, lean, and remarkably nimble.
Wild hogs do tremendous damage, yet I find them to be very interesting animals. They've been in Florida longer than English-speaking people. I would enjoy reading about more of your experiences with them in Canada.
Best regards,
Notchy Bob