He's a Thoroughbred
by Marvin J. Ashton - "To Whom It May Concern", p. 234-235
 

"They tell me that all fleet-of-foot horses have made a name for themselves have originated from old Arabian stock...the Arabian thought as much of his mount as he did of his children.  These animals were watched and tutored better than their own children.  The horse was the pride of the family, and his development was watched and guided with the greatest love in the world.

Now let's note one thing about the animals training.  They determined that he should in every deed be a thoroughbred.  When the colt is a few months old, they ring a bell and push the little fellow over to his masters tent.  To make a long story short, they repeat the operation until in a few weeks, the intelligent little fellow automatically, when he hears the bell ring, turns right around, no matter what he is doing, and trots off to his masters tent.

But the day of testing is coming--a day, if you please, when his mettle will be tried--a test to determine whether they've raised fifteen hundred pounds of horseflesh or a creature to be labeled a "thoroughbred".  Well, just what do they do with him?  How do they determine his worth?  Now watch---here are the details of the examination:  He's now going to get a diploma or labeled a cull.

The horse is now three years old.  They have rung his bell every day and he hasn't missed a perfect response--not a hesitation at the sound of the bell, a beeline to the tent of his master.  But so far no great sacrifice has been asked of him, but on this day of exam, it's going to be different.

They keep him...away from water for three days...his tongue is as thick as leather.  The third day he's done everything but jump the fence for  water.  While in this desperate condition, when everything is ready, they let down the bars of the corral.  He leaps like a deer...when he's halfway there...to the water....they ring the bell.  If he continues his run for water, he's a cull.  If he turns right around and runs to his master's tent, he's a thoroughbred.  He is sent over the ocean and to the ends of the earth."