The word "vetted" is everywhere, and everyone uses it as if they know what they are talking about…even though I’d never heard it until recently. But when I asked friends, even the kind who usually know their stufft, none of them knew where the word came from or what it really meant (other than the obvious.) So, I decided to look it up.
This is what I found:
checked for health and soundness by a veterinarian before being allowed to race.
(Wikipedia, but I confirmed it elsewhere, too)