
I had a Belgian Shepherd that used to scream when she heard my next door neighbour in his Garden, and my current breed cam be vocal. I used the get them in the house method as soon as they started and it worked with both breeds. In the house I use a spray bottle, with the nozzle adjusted to a jet, not a spray, and squirt in the face and quietly tell them no, and reward for being quiet. It is enough now for me to pick it up and there is silence from my four Elkhounds. As I had allowed the awful problem to develop with the BSD, which I broke her of by dragging her into the house each and every time she yelled, I only had to do this a couple of times with the Elkie Pups and they soon got the idea. If they want to be nosey they have to be quiet!!
I understand that the Aboistop co;;ar can be effective, but it isn't cheap!