Crocodiles, Tsunami, Yeti, Bears and Cougars are the biggest concerns I have, and living in central Canada, the first two aren't very likely. And Thinking Dog is pretty good with bears. So really Yeti and Cougars are my biggest concerns here. I read that if you encounter a Yeti, you are supposed to point and yell "Look, there's a dead Yak!", and when he looks away to see it, you run in the other direction. Haven't had a chance to try it yet, but when I do, I'll let you know how it goes.