Safe, humane and EPA approved, Muzzle Dog Repellent Spray gives you powerful protection against aggressive dogs without causing them serious harm or injury. Not all dogs want to be your best friend. Muzzle Dog Repellent provides powerful, yet humane, defense against threatening dog situations so you can walk, exercise and explore more freely. Muzzle Dog Repellent Pepper Spray is ready if and when you need it. Simply put your thumb under the flip-top safety cap and press down on the red actuator button to spray.