Horses might not work because of the versions you are using.
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There isn't horses in normal minecraft, but you can however ride a pig by putting a saddle on it. If you have seen anyone have horses in minecraft, it may have been a mod!
Horses in Minecraft eat hay. This can be made using wheat. You can also feed them apples.
There are no horses in default Minecraft, however, there are many great mods such as mo' creatures which implement horses.
Apples
there are no horses