Today I used something new against a "pursuit dog". As I was nearing home a dog decided it wanted to chase and possibly nibble . Awhile ago I bought one of those distress air horns in the sporting goods dept at W.M. to bring on my commutes . As the dog neared I just gave a short blast at it...that dog did quite a U-turn and I got to proceed on my merry way. I was just wondering if any one else has used one. I don't see where it would be harmful, but I know now it works. I'm not a good sprinter at my age anymore..ha.