Dog Whistle to Stop Barking by Pet Prime - FREE Lanyard Strap & Dog Whistle Guide eBook - Complete Set for Repellent, Obedience and Training Aid &#x2605;Practice one at a time until the dog learns the pattern, then move on to the next pattern. Be sure to have special dog treats when training your dog. &#x2605;TEACH COMMANDS:2 short whistle can mean "Stay",1 short l longwhistles can mean "Sit",2 short whistle can mean "Come" &#x2605;100% MONEY BACK GUARANTEE & LIFETIME WARRANTY :You have nothing to loss, Give us a try and you will be very happy and satisfied