I was a little taken aback when I saw this "training collar" on a special offer at one of my favorite online shopping sites. As always, I launched into research to try to get a clearer understanding of why such a thing exists. I expected to find polarized views in favor and against the use of what I would call correction collars. Surprisingly, I found that, even on sites and forums on which people contended that these could be used effectively, they almost always warned of the dangers associated with an untrained person trying to use one of these and of common circumstances that could result in injury to the animal. Likewise, they noted that the use of correction collars is complicated, as dogs may associate the pain inflicted not with their behavior, but with the environment, other animals, and even people, which can actually result in aggressive and/or fearful behavior in your dog. If you are considering using something like this with your dog, please consider that there are much safer and humane ways to elicit appropriate behavior from your pet.