A leash training device embodying a non-invasive and non-threatening method of using the same to train a dog is provided. The leash training device may include a liquid sprayer having a housing forming a handle portion and a leash assembly. While grasping the handle portion so as to manage the dog on the other end of the leash assembly, the liquid sprayer is adapted so that the user may discharge a jet of liquid from a reservoir secured within the housing. The method includes discharging the jet at or on the dog engaged in bad behavior.