Works most of the time...

The device tends to calm my dog down as soon as I put the collar on her. It usually works when she barks, however randomly it won't work. I wish it was more consistent with going off when she barks. Typically, when it goes off once she won't bark anymore for a while. Also, I would not recommend leaving the collar on when your dog plays or sleeps if they tend to growl or have dreams. When I first got the collar I found that sometimes she would make it go off while playing and dreaming, so I stopped leaving it on during those times. I also have to constantly re-tighten the collar because it loosens up as my dog runs around. I have not tried the whistle out much, however it does get my dog's attention. Overall, good item, but could be improved.

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