Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Not So Great for Hounds or Prolific Barkers

Definitely not the right product for a hound. We have a Treeing Walker that we adopted from the shelter last year, and he barks A LOT. He barks so much that a neighbor called the Humane Officer and complained. We tried the collar on the recommendations of a friend who had used one with much success and our vet. Copper quickly learned that he could bark through the contents of the collar quickly then he was free to bark to his heart's content - much to the annoyance of everyone around. Also, the first collar we received clogged within a week and had to be returned to the manufacturer. The second collar worked fine for a month, with very frequent refillings, and then clogged just like the first one. I will say this for Premier, they are very responsive to complaints and want to work with you to solve any problems. It's unfortunate that this collar didn't work, but we'll keep searching for another solution.