This thread is great. I lived in the Arctic for several years. I've been sprayed by pepper spray. I've used it on people and dogs, and I've seen it work on P-Bear. It works. Period, as long as it's applied correctly. The only animal in the world that can fight through spray is the human, because they have the ability to think through the sprays effects. And even then, the main thought on your mind is get the F outta there. Animals react the same way when they can't open their eyes, everything burns and breathing becomes labored. They flee and start rubbing their faces. The P-Bear I saw sprayed was doing flips and spins and howled like crazy, then took off like a shot. Every dog I've seen it used on goes nuts crazy and has no clue which way is up, or walks away and sticks their head in the snow and rubs like crazy for hours. Animals have no resistance to spray....
That being said.... I carry spray AND a Kimber 84 in .338 Fed with 200 grn Accubonds loaded close to max when I go in the bush baiting..... Cause I prefer the black ones I'm around now don't get close enough to spray....