I've thought about the emergency hand held air horns you get at WalMarts for your boats. They claim about 80 blasts per canister. I've got mace from Police supply stores, but it blows everywhere. Around here in La the drug dealers ride bikes and tie their Pit Bulls to the bike and force them to get in shape or get jerked around. Some come running by with a foot of tongue hanging out. So out running one would be good training! As mean as they are to the dogs they still defend the thug in a dispute, and guard their cache at night. If anyone ever sells a lazer gun, well, I want one. Dickey Greer West Monroe,La Dickey's Recreation Room