GOT A YAPPING MUTT THATS DRIVING YOU AND THE NEIGHBOURS NUTS ...WELL STICK THIS THING ROUND THERE LITTLE THROATS AND IN LESS THAN A WEEK YOU WON'T FEEL LIKE CUTTING THERE THROATS ANYMORE....enough, we had our two retrievers barking all the time and less than a week they stopped.When they bark a signal/current is given off and they soon get the idea