I guess my thinking is that it mist will still reach the dog's nose and he will get a whiff. I can't imagine that a little OC wouldn't hurt that impressive olfactory organ. If the dog is on the edge, trying to decide what to do, it might push him over to the side of moving along.

Also, I hope I was clear (in this post and the one that I linked to) that if the dog is agressive and committed to attack that you need something more effective than OC.

-john