The problem with barking dogs, little or big, is owners with little minds. Just read a few responses that essentially says "dogs bark, that's what they do, what do you expect me to do about it?" Therein lies the problem pure and simple. I've given up on neighbors with unruly dogs that bark constantly and refuse to do anything about it. I think it's sort of like music to their ears to hear their dogs acting bravely and protecting them and their property. I will not tolerate this anymore and now have an ultrasonic unit that "barks" back at the dogs until they stop their yapping.The unit works great. Dog barks, I bark back. Dog gets quiet. It's much,much better than trying to reason with unreasonable pet owners and get into a confrontation with them. I don't for one moment believe they don't know that their dog is barking. They don't give a hoot if it's bothering you or not. They just somehow think it's an inalienable right for their pooch to bark and yap incessantly. And yes, I do own a very well behaved and quiet dog.