My Sassy barked at everything, it was driving me crazy, and when she started then my other dog would start. I did a lot of researching to find something that would stop her from barking at every little thing. Then I found this collar, read the reviews and thought why not give it a try, and OMG IT WORKED - she no longer barks at every little thing, I can stand outside and talk to the neighbors without being drowned out by her barking. I SIMPLY LOVE THIS COLLAR, Thank you!!!!!Viola BergeronMichigan