A roomful of dog trainers will  never agree on the best equipment for walking, training, or exercising a  dog. How do you decide which training equipment is right for you and  your dog? First, understand that you, alone, are responsible for  choosing appropriate, humane, effective training equipment for your dog   not  your trainer, spouse, your dog’s breeder, or  acquaintances from the dog park. It’s your responsibility to make sure  that the equipment fits your dog properly, and that it does not hurt or  stress your dog. Ask for the opinion of dog- friendly professionals you  trust, but don’t be pressured into using any gear that appears to bother  your dog if you want him to trust you and enjoy your time  together.