"I'm A Believer!"
One of our rescue dogs is a young English Shepherd with NO previous human interaction. I bought this out of sheer desperation. The change in her in just 1 day was undeniable. I was skeptical, it seemed too easy. Well it IS easy and it DOES work!
I have a rather spastic cockapoo, she's a good girl but if you pay any attention to the other dog or one of the cats she moves in on them and gets in your face. She really is sweet, but very needy. I put this collar on her last night and just 12 hours later she was like a different dog. She stood quietly next to ne while I leaned down and gave the other dog some attention, it was like NIGHT AND DAY! Great product.