What, have you never met a warg?
He’s a warg. He can enter the mind of animals, see through their eyes.

The King Beyond the Wall » Mance Rayder
“Free folk don’t follow names, or little cloth animals sewn on a tunic,” the King-Beyond-the-Wall had told him. “They won’t dance for coins, they don’t care how your style yourself or what that chain of office means or who your grandsire was. They follow strength. They follow the man.”
The King-beyond-the-Wall looked nothing like a king, nor even much a wildling. He was of middling height, slender, sharp-faced, with shrewd brown eyes and long brown hair that had gone mostly to grey.