Bests & Worsts Reviews from Amazon

I have three rescued german shepherd girls. They love to bark at every dog that walks by. This has become so exciting for them they bark louder, longer and more often. So I fear for my neighbors and bought three collars. Having three dogs I was able to observe three different behaviors. I set up all collars according to directions. I adjusted the sensitivity very low, about 20% and left them on "tone only" (no shock). All collars worked perfectly, making the warning tone. This caused no decrease in barking. I now set collars to "low shock". Dog #1 figured the new system out in 1 hour and now just sits down and not bark at all. I have removed the collar completely and she remains a quiet dog. Dog #2 was the loudest and would continue to bark through the mild shocks. I increased the shock level and eventually this wore her down after a few days. She now only wears the collar in the evenings and its back on "low shock". I'd say her barking has decreased 60%. Dog #3 figured the system out and has decreased barking 80%. She constantly is testing the collar by barking quietly and gradually increasing the noise until a shock happens. I placed the collar on "tone only" and this works most of the time. She wears the collar as needed. Overall I am very pleased with the collars. I hate having to resort to this, but they were getting out of control. The biggest success is: they only bark if they actually see another dog. No more false alarms. They don't bark as loud and they stop barking immediately when the dog goes out of sight. Dog #2 wears the collar every night, but the others are "as needed". I think thats a good success rate and better than a noise ticket from the police. I think these are an excellent collar and are not expensive.