Review on MODUS Ultrasonic Dog Barking Deterrent Device: 16.4Ft Range, Anti-Barking, Dog Trainer, Wrist Strap, LED Indicate, Indoor/Outdoor, Battery Included by Lisa Zimmerman

It didn't work for my dog. I have a 6 month old puppy who likes to bark a lot and likes to dig so I wanted to train him with this but it has made him a lot worse. The first time I pressed the button she made her bark even louder, so I pressed the button again and she broke away, became very aggressive and attacked me and my hands to bite her. I didn't press the button again, but she was so agitated and aggressive that I had to hold her down for a few minutes before she calmed down. Once she calmed down, she reverted to her normal sweet self. I know it's safe for all breeds, my pup is a pit and I don't know if it was this brand or that I looked at that says some dogs' sound can make them aggressive regardless from race. it just depends on the dog. My dog is usually very sweet and loves everyone so I didn't think she would react like that but she did. So be careful if you've never used anything like this on your dog before. I had no problems with the return.