Mearas

The Mearas were a breed of wild horses in the north of Middle-earth. They surpass normal horses in intelligence, speed and strength. According to lore, the ancestors of the Mearas were brought from the West by Oromë.
== Description ==
The Mearas were strong, wild, and intelligent. They would bear no man but the kings or princes of the Mark (with Gandalf as a notable exception). Their lifespan was as long as men.
Felaróf and Snowmane were white, whereas Shadowfax was grey.
== History ==
They were descended from Felaróf, who was tamed by the first King of Rohan, Eorl. The descendants of Felaróf would later become the mounts of the King of Rohan, and would bear no one except for the Kings of the Mark and their sons.
During the Third Age, Gandalf was given consent to ride Shadowfax, Lord of the Mearas. Shadowfax continued to accompany Gandalf throughout the latter half War of the Ring. He was also present at the Grey Havens when Gandalf sailed to Valinor.