Absalom
SWCA Member, Absent Comrade
So bear spray has less of the stuff that repels the attacker than the stuff used on humans? Wonder why?
Mostly because the whole point is to repel the bear and get it to run away. You don't want it collapsing and writhing on the ground having a rip-roaring meltdown right in front of you slashing the air and possibly you.
I don't remember the ratios and am too lazy to look them up right now, but the bear's nose has an area of olfactory receptors several hundred times larger in surface than a human nose, and much less protected. The area of a bear's brain reacting to smell -and by extension an assault on those senses- is also several times larger proportionally than a humans. The same applies in different degrees to dogs and other animals with big wet noses.
So good bear spray is formulated to trigger an immediate recoiling and retreating reflex, but not disable the bear.