A henny is a mule that has a jenny for a mother and a stallion for a father and they are generally smaller in size. But they are still considered a mule. It goes like this: A jack is an uncut male donkey. A jenny is a female donkey. A mule is a cross between a donkey and a horse. It doesn't matter which one is mom and which one is dad, it is still a donkey. However a henny is donkey mom, horse dad. A john is a gelded male mule, and a molly is a female mule. And mules are awesome.
If it's not half ass, it's just a horse!