We have an excitable golden puppy that's 4 years old. When ever we have company he can't control himself. We have an electric collar for him to take him on walks etc. We have found this really works indoors as well just when we have guests. We have never had to use a full strength zap on him, just a little buzz. Our collar has 3 buzzing levels and 127 power levels (first a warning, 2nd a stronger warning and then a zap). He doesn't even like a second warning so we hardly even use that one. It also keeps him safe outdoors.