Feed Skeleton Horses Milk

With Zombie Horses added in the new Mounts of Mayhem snapshots, it was also included that they could be lured and healed with red mushrooms, with the zombie riders even being able to drop a red mushroom upon defeat to clue the player in on this idea.

Skeleton horses don't have a similar method for healing or luring them, so why not a Bucket of Milk? It would work as a play on the whole 'milk gives strong bones' idea too.