Dapples! These circles of lighter-colored hair make a horse sparkle and shine and draw the attention of even the most inexperienced eye.
A missense mutation in PMEL17 is associated with the Silver coat color in the horse, BMC Genomic Data
Black Horse Genes by lXxMellodyxXl on DeviantArt
Dapple variations
What is the difference between a stallion and a Mustang? - Quora
Dapple Gray Horse Facts with Pictures
How to Get Dapples on Your Horse – [Causes of Dappling]
Horse Dapples 101: Everything You Need To Know
What do I need to compete at horse jumping? Do I need my own horse and lots of money? - Quora
What makes some horses easier to train than others? - Quora
All About Horse Dapples (Genetics, Breeds, etc.) - Horse Rookie
Dapple Grey Horses - Genetics, Health, and Other Facts.