So we adopted a male schnauzer named Luke, Luke is 8 yrs old and a constant barker. We have another mini schnauzer that is a service dog. Luke had taught him to bark all the time as well. So I did some research and found the Sunbeam sonic egg. I read the reviews, some were good, some bad. So this is what I have learned about the sonic egg. We only activate it if we are going to be gone or we are expecting company. If you have loud noise in your house, like kids and loud TV. It will give your dog a blast constantly. So we bought the hand held egg as well. I keep it near me when the big egg is off. If the dogs start to bark, I push the button on the hand held and they stop right away. When they go out doors, if I hear them barking, I push the button and they shut right up. The large egg is 39.99 the hand held is 19,99. I want to buy a truck load of these. If you use them right and not to torture you animal. You will be so happy with this product. Walking our dogs is a whole new wonderful experience now. No pulling on the leashes or barking at everything that moves. This is much better than the shock collars and less painful for your pet if used properly. Use it as needed. My large egg has not been on for days and they do not bark at all. Our house is burglar proof, so I do not need my dogs to bark to protect us. We have taken good care of that. Good luck and a happy no barking to you and your furry kids