This battery-free training tool will help teach small dogs (up to 50 pounds) to not run away from their owners. The Amazing Dog Stopper simply clips onto a dog’s collar and is activated when the dog starts to run. A dog bone pendant will descend and interrupt the running by gently bumping against the dog’s legs. When the dog stops running, the pendant returns to the collar. Available in red, blue and yellow, the Amazing Dog Stopper is made in the USA.