This is both a question and a suggestion depending on whether it already exists or not, but can you ride horses yet? I see them every now and then on farms and ranches, but it seems like all they are good for atm is butchering.
I’m thinking that when not riding the horse, you could have it follow you by 'A’pplying a long rope to the horse. you could tie the rope off to trees, fences, etc. or you could actually RIDE the horse as a transportation method that requires no fuel. you could even make armor and saddle bags for the horse in the oblivion/skyrim style.
I like the idea of having to keep your horse alive, you know? mobs don’t tend to actively screw with a bike, or a car unless it happens to be between point A(zombie) and point B(soon-to-be-zombie). but a horse… a horse would be like a beacon to nearby Zeds, so you would NEED to keep it protected, and bandaged, and first-aided, and inti-biotic’ed.