We love these two training leashes - The Gentle Leader trains your dog to walk comfortably next to you - no more tugging or lunging. The 15 ft. Training Leash is another of our favorites. As you're training your dog to sit and stay, you need to be able to move far enough away from the dog to make sure they maintain the position. This long leash lets you still have control of your dog for safety while your dog learns to sit, stay, and come on command.