All joking aside. The 1st rule of self defence for you OR your dog is NOT get in the situtation in the 1st place. Educate yourself about the area you plan to travel with your dog, talk with other dog owners. Runners & cyclist know were every off leash dog lives :roll: For a person that isn't physcically strong enough or doesn't have the expeience with dominate breeds the Stum Baton is the way to go IMHO. I million volts will drop any dog or man PERIOD. allowing you time to leave. http://www.stungunscheaper.com/_Streetwise_1,000,000_Volt_Rechargeable_Stun_Baton_wzzzLED_Flashlight_.php?ref=stbtns