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Review title: How do you know it's working? My dog acts like it doesn't
Product review: When we first used in on our 1 yo yapping Bichon, he seemed to look around to see what it was. That lasted about a day. After that, no matter if we were pushing the manual button close to him, he didn't bat an eye. We have no idea if it was working. I would have returned it but - of course - we lost the receipt.
