I am a huge fan of having these pits/mats by the waterer and by the main gate to stop it from becoming a mud hole. Which is a big problem here in western Canada. (Also this link has some cool tips)<<like this pinners idea
Oh, how well I remember Misty of Chincoteague from my childhood goodreads. Wild ponies cross a creek in Virginia, after being rounded up for next week's annual swim across the Assateague channel to Chincoteague Island.