I don't remember who suggested it - maybe Teresa Ford - but our Jax had become a barking maniac. No one could come in the house or walk down our street without him going off. Could not take him anywhere. When we were camping, it was very embarrassing to me that he was so ill-mannered. But . . . all that changed with just a little spray bottle of water!
I used the "quiet" command to him and if he did not stop (of course he didn't) he got a stream sprayed at him. He DID NOT like it at all. It took about two weeks of somewhat sporadic training but when I took him on a camping trip last weekend it was like a miracle! It finally paid off and he would stop when I asked him. Our neighbors had the CUTEST Biewer ever who was also a barker. This kind of egged Jax on but I was able to get him to stop even with another barker around, in fact, they said "spray our dog too"!
I did go to Walmart and got several small spray bottles so I could have them handy around the house. Very small investment . . . VERY BIG PAYOFF!!!