The collar works fairly well however I think it's a little bit too aggressive initially for the smaller dogs. The on/off button is quite difficult to use and ours seems like it's a bit messed up or they missed it on there QC check.

Works great for our Pomeranian. Chronic barking cured! She is so much nicer to be around.

Collar is not shaping to the neck of my small dog.

We are an older couple. We had two rat terriers over the years and just loved them. Two year’s following the passings of our 16 & 17 year-old year old rat terriers, we decided we needed another one to complete our home. Our new puppy, now 3 year’s old, was a major barker and had anxiety issues we had a difficult time controlling. We took her to dg trading early on, but had our hands full and wondered how we would survive. Alas, the NanoBark Collar was recommended to us. The best recommendation -ever. Life changing to say the least. Our puppy loves it. Instantly, she doesn’t bark with the collar on, she is more relaxed, but not stressed. She actually comes when I tell her we’re putting her collar on, which is amazing. We used to have to chase her around the house to put her old collar on. I can walk her now without her wanting to attack other dogs. I believe, this collar makes her feel safe, secure, and happier. I think it may relieve her from having to protect her people and home. Life changing. She has become an amazing puppy with or without the collar on. We enjoy her so much. We tried other collars, without favorable results. This collar has been life changing. We are happier and our puppy is happier. AMAZING!!