Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Doesn't work at all!!

Wish there was a rating lower than 1 star. I have a Border Collie that barks at everything. So I decided to order a Innotek No-Bark Collar BC-50B. I put the collar on her, she heard something and started barking - NONSTOP. For some reason the collar never activated. So I tested it to make sure it was working and it was. Then I called Innotek's Customer Service to talk to them about the problem. I was told to trim the hair from her neck around her voice box to make sure the contacts could touch her skin. So I trimmed her hair put the collar on and made sure the contacts were on her skin. She heard something started barking and once again it never activated. The little red light never came on or started to flash. I swear I think she barked more with it on. It has been a total waste of money. Invest in a $1 squirt bottle you can put water in. That's what I've done and it's helped. When she starts barking I just squirt her and say no and she stops.