horses.

[middo]

It should be like this
You buy a horse ((Full horse or transport Pony))
and you can ride it, as you ride it, it slowly gains strength
but under the horse is its HP, Hunger bar, and stamina bar ((HP would be red, Hunger would be blue))
when your horse gets hungry you just stop, and let it eat grass, or let it drink water from a river of some sort.
And when it gets tired, just let it sit for a while hwen your NOT on it.
When its HP reaches 0, it doesnt really die, it just kinda lays there for a while.
X_X
and you should just stay next to it.