Review on Ultrasonic Dog Bark Deterrent Rechargeable by Robert Edmondson

I only gave this one 4 stars because I think it harms my puppies. Works great. But it definitely made my dogs uncomfortable, to the point where anyone who barked would immediately stop barking and cowardly run to another room. I only had to use ultrasonic sound once. After that I just used the horn and she stopped barking without ultrasound. The only problem I see with this is that my poor other innocent dog also heard the fix and ate his lunch when I used it. This startled her so much that she was afraid to go near her bowl again and afraid of me too. So you have to be really careful how you use it with multiple dogs when only one needs to be fixed. I kinda doubt if I will use it in the future.