I've only had it for a day, so not enough time to see final results. When barking, my dogs stop and seem confused. Then they start up again. I think it will work in time as there is a reaction. When my boy growls at me, it stops him. Now I just need to point it at him without turning it on, and he stops. That makes me feel safer and I think he's learning that growling is unacceptable behavior. That's great for one day's trial.
Bottom Line: Yes, I would recommend this to a friend
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