When I lived in suburbia, as opposed to my now rural abode....I built a shed in the corner of my lot by the fenced in house, they had little dogs, I'd say three ....I don't know what kind because of the fence..they would bark and it was annoying to say the least...almost every-time I'd go out to the shed they would let them out and the would come over and bark.....I was at a loss as what to do, but I came up with an idea . When they came out and barked, I taped them for about twenty minutes .....next time the started barking I put the speaker by the fence and played it back ....they went ballistic, like a nest of furry hornets, and the owners finally got it ..

..hope that helps