I know exactly what you speak of.
Man O War would be considered a “chunky, heavy” horse, now.
Some blame Native Dancer for the broken legs curse.
Homeboykris was a ND linebred but it seems his legs held up and his heart gave out, if I had to bet.
Horses are not meant to be built like Greyhounds.
The Spanish Mustangs we love, along with the Andalusian and the Barbs.
Good horses.
I sure do love my Spanish Mustang,great trail horse-always thinking.A horse that’s willing to work with you.Same for our Missouri Foxtrotter except he’s not nearly as smart.