I know corrector collars are a bit contraversial but i use one on my adult pug. She has a tendancy to bark at any voices she hears in the surrounding back gardens.

I put a spray collar on her when i am out so she can go in and out her dog flap without causing a nuisance. As soon as she has it on she is silent. Job done!

They aren't cruel but they do correct the behaviour, EVERY time. We have the abois stop - the company of animals one.