Have you ever seen a horse with musical talent? Well, this horse seems to have taken to the keyboard quite naturally. He even plays a nice tune.
Sometimes horses take up unusual habits, like fiddling with a keyboard or playing with a broom while in their stalls. This horse seems to be really active with his mouth and muzzle, and the keyboard provides a good outlet for him.
If your horse gets bored in his stall, see if you can give him an outlet for his extra energy. There are many stall toys that you can give to your horse. Of course, nothing beats increasing your horse’s turnout time so that he can keep himself entertained and burn off some extra energy.