THE ROLLING BALL.
There are several modifications of this trick, or rather there are several feats all performed with this instrument—a globe of wood or other material some two feet in diameter. One of these feats consists in the dog standing with his hind feet upon the ground, and resting his paws on the ball, pushing it forward, or up and down an inclined plane. This is easily taught, and the only difficult part of the performance is the descent of the inclined plane, where the ball is apt to roll away from the animal. To teach this trick it is only requisite to place the dog’s paws upon the ball and set it slowly in motion; as you do this tap his hind legs gently from behind to urge him to step forward. It may be necessary to hold him in position by the nape of the neck at first, but he should very soon learn to retain his position without this aid. When he rolls the ball readily upon a level, substitute a wide plank very slightly inclined, up which he should be required to roll the ball. Increase the inclination of the plank slightly with each lesson, but the descent should only be attempted after he has been thoroughly drilled in the preceding exercises. It will be necessary to commence with a very slight inclination and to promptly stop the ball should the dog begin to lose control of it. The width of the plank may be decreased eventually to some ten or twelve inches.
To stand entirely upon the ball while it is in motion, and to propel it backward and forward, and up and down the inclined plane, starting and stopping it as well as guiding its motions in the desired direction—is a more difficult feat. In this the dog must be practiced in standing upon the ball while it has no motion; in several lessons in this just the barest possible motion is to be given to the ball while a slight hold upon the dog’s neck keeps him in position. The motion may be slowly increased with each lesson, but the ball must for many lessons be held firmly with the hand to prevent it becoming unmanageable. When the dog becomes able to maintain his position he may be required to manage the ball without any assistance. In all cases where he gets down from the ball, accidentally or willfully, he should be spoken to sharply, but the trainer should be equally prompt to praise and reward success.