Smart Little Lena suffered a stroke and was euthanized Monday August 30, 2010 at his home in Aubrey Texas.
He was 31 years old.
Arguably both the greatest show horse, and the greatest sire in the history of the National Cutting Horse Association, the tiny sorrel earned $743,275 in only eight shows.
His offspring have earned in excess of 34 million dollars in the cutting pen alone.
He has also sired champion Reining and Working Cow Horses.
I really am not crazy about the video available for Smart Little Lena at this sitting, so in order to answer the question,
"Just what the hell is a cutting horse anyway?"
Here's promotional video of Metallic Cat doing his thing.
Smart Little Lena sired both of Metallic Cat's grandams (grandmothers)