We got the Sportdog bark collar as our male GSD was very territorial and barked incessantly when anyone walked through the alley next to our house. We received a noise complaint from the neighbours (and no wonder!). We put the bark collar on him and within x2 uses (on just level 1) he was significantly quieter and much calmer! No more crazy running around the house or yard with his hackles up either! He is able to calm himself and just listen as people go through. He can still bark softly or whine a little bit to let us know when he wants to come back in/go out. Super happy! The Dog Line were also really responsive and gave great additional tips and support on how to use the collar. Although we tried everything else and didn't want to have to use a bark collar, we're really glad we have in the end