How to make pigeons learn to bowl?

How to make pigeons learn to bowl Skinner is based on the principle of conditioned reflex. Put the bowling ball on a slope, paste food pictures on the bowling ball, and put a hungry pigeon near the bowling ball. When the pigeon pecks at the pictures on the bowling ball to move the ball, reward the food in time, and repeat it several times. First, tear off the picture on the ball and repeat it several times. Pigeons will take the initiative to peck when they see bowling, thus learning to bowl.