When looking through the 93 "Chestnut" images at Acclaim Images.com this Chestnut Foal In Close-Up was a favorite.
All of their pictures are hand picked, availiable in a number of formats, and you can even get custom prints and posters.

Description:
Chestnut Foal In Close-Up
Chestnut foal in close-up showing fine detail in muzzle, eyes and ears

Some related terms for more images:
foals,  cathy mckinty,  horses,  animal,  colt,  colts,  fillies,  animals,  filly,