No riding Sunday, so something else instead . . .
I was doing some research on Russian icons, and stumbled across this icon (wikimedia commons) of the patron saints of horses, Sts. Florus and Laurus (or Sts. Frol and Lavr from Russian sources) - this icon is from the late 15th century:
I love the mare with the bell and the foals portrayed as miniature adult horses.
This second icon (from skete.com) is pretty clearly based on the first one - it's from the 17th century:
I think the first icon is more powerful in depicting the "spirit" of horses, although the cavorting foal in the second one is lovely.
The legend of Sts. Florus and Laurus isn't particularly edifying and has little to do with horses, but I liked the icons and thought you might as well.