First of all, this spray does work in that your dog will not like it AT ALL! I've tested it on 3 different dogs. The second pointer is not as great. The effects do not last very long. I've used it to deter the office dog from chewing on the baseboard corners. I've used it at home to deter my dog from chewing on my stuff. I've used it on my new dog to deter her from biting my other dog's face LOL. Along the way, I've used it to deter them both from chewing on things like their beds, training rugs, etc. This product was purchased from Amazon.