Large wild animals, when alive and unrestrained, are rarely our friends. Do not believe cute cartoons showing sweet critters. Especially avoid beasts that outweigh you greatly. Just move away, calmly, quietly, and get behind something solid.
If you MUST venture into the back country, hike with someone slow whom you don’t care for. You only have to outrun them, not the bison or bear or moose chasing you both. 😉