Instruct: Classify Amazon reviews into positive or negative sentiment
Query: How do you know it's working? My dog acts like it doesn't

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.