A brindle horse is a horse with a rare and unusual coat pattern that looks similar to the brindle pattern seen in dogs or cattle. The coat shows vertical or slightly swirling stripes of darker or lighter hair running across the body, creating a tiger-striped effect. Key facts about brindle horses: Extremely rare: True genetic brindle is one of the rarest horse coat patterns. Stripe pattern: The stripes may be bold or very faint, appearing mostly on the shoulders, ribs, and hindquarters. Caused b