A farmer tried for years to tell his two horses apart.  He cut off one’s tail, which worked for a while but then grew back.  He cut off one’s mane, but the same problem occurred.  Finally he found an answer – he measured them, and determined that the black one was an inch taller than the white one.

The same farmer tried training his horse to eat less.  “I gave him a little less feed every week and things were going well.  But just when I got him to the point where he wasn’t needing any grain, he up and died on me.”