There will be three new carrots to change/upgrade horses: lapis lazuli will allow you to change the color of the horse, the emerald will change the type (normal, skeleton, zombie), and diamond hearts add life. Will look pretty scary.
How to install Horse Upgrades
- Download and install Minecraft Forge
- Download mod
- Do not unzip it, copy to C:\Users\User_Name\AppData\ Roaming\.minecraft\mods