This is the pistons and camshafts that some suggest we can discern. Do you really know how the car runs, just because you turn the key???

Anatomy in Motion
The Visible Horse

By painting the horse's muscles on one side, and the bone structure on the other side, it makes it easy to understand how the horse's body works. By looking at the horse's muscles, you can see what makes good balance and nice movement. The colorful major muscle groups show how the muscles work. It's plain to see what causes poor or good movement, and common causes of movement problems.

Why some elephants can do a one foot stand and some can't may have nothing to do with intelligence. Why some tigers can do a hind leg walk and some can't, may not have anything to do with intelligence. That's why you stay as far away from "7" as possible, Anything to keep from going there, Back up steps, start over, what ever but stay away from "7" . Once you are there, they get intelligent and learn they can't be "made" to do anything. That's when the terrible cruelty of some animal/horse trainers cause injury, destruction, and death to them or the animal, whom ever is the strongest.