Donkeys are breed-able by the same process, while mules are not. Bred horses tend to be the average of adults. For this reason, the fastest horses and the strongest horses are always found in the wild as they can spawn that way. The reason being is because the foal gets its traits from its parents based on an average.
Top 10 Minecraft Best Horse
The rarest regular spawning horse is easily the skeleton horse…
One of the rarest colors, a white horse has white hair and fully or largely unpigmented (pink) skin. These horses are born white, with blue or brown eyes, and remain white for life. The vast majority of so-called “white” horses are actually grays with a fully white hair coat.
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).
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.
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.
Leather is the weakest, and despite Gold being the weakest armor material because of its low durability, Gold Horse Armor is slightly more effective than Iron Horse Armor. It provides more protection, and it is much rarer. Diamond Horse Armor is still the best type to use for protection when it comes to horse armor.