In Minecraft, you can not feed a skeleton horse! Since a skeleton horse is undead, the Instant Damage effect will restore health points to the skeleton horse. Try throwing a splash potion or lingering potion of Harming at the skeleton horse or shoot an arrow of Harming at the skeleton horse to restore its health.
Breeding. Horses are breed-able by riding them and right-clicking on them with golden carrots or golden apples. A horse may also be bred with a donkey to produce a mule.
Skeleton horses should behave like skeletons (Burn in the sun & despawn quicker in the day) … The only way to find/ capture a skeleton horse is if a living one gets struck by lightning.
After spawning in a Zombie Horse and a Skeleton Horse, both seem to die randomly after some time has passed. … But since zombie horses & skeleton horses are undead mobs, this healing effect actually damages them.
A skeleton horse can be tamed by killing the skeleton that is riding the horse. Then, the player will be able to tame it. A saddle is required, too.
A “skeleton trap” horse is a skeleton horse spawned from a fraction of lightning strikes during a thunderstorm or by chance (0.75–1.5% chance on Easy, 1.5–4% on Normal, and 2.25–6.75% on Hard, depending on regional difficulty).
Zombie horses can now be tamed and leashed. The textures of zombie horses have now been changed.
Skeleton horses are rare mobs that are a variation of skeletons. They can spawn if a horse is struck by lightning. They despawn very quickly though. Unlike regular horses, they will not kick the player off if they go more than 2 blocks underwater but will sink instead.
A skeleton horse will be tamed, and ridable, if you hold a hay bale to it. However, I think this is only possible if it was spawned. Here is tutorial of how to tame and ride a horse, put saddle or armor on horse and get off it.
You can summon a skeleton horse whenever you want using a cheat (game command) in Minecraft. There are many options for summoning skeleton horses. You can spawn one that is wild, tame or wearing a saddle. A skeleton horse does not spawn naturally in the game so you have to use the /summon command to spawn one.
The horses are not tied up with rope and they can be wild or tamed. While playing the game, in both creative and survival mode, when I have moved away from the pen about 150 blocks, then return, the horses can and do despawn. If the horses are wearing armor, they do not despawn.