Wrong and wrong. We have raised both. (Mules are easier to raise. It is harder to get a donkey pregnant by a stallion.)
The mule looks more like a donkey. Mules have narrower hooves, a thinner mane and tail and usually has bigger ears.
Hinnies have rounder feet. You can usually just make a regular horse shoe a little more narrow and it will fit a hinny just fine. They are not a high heeled either.
Hinnies have a more full 'horse-like' tail and usually have a bit smaller ears. Often times they are a bit shorter in the back, too. They just have a little more horse-like appearance.
I have not ever used hinnies as hard as I have mules. I used to pack a lot of mules in the mountains of Colorado and it was incredible what they could carry and where they could go with it. I have only used hinnies as saddle stock, but everyone I know that has used them has said they were not a hardy or as tough as a mule is. I really have not ridden any that hard.
A hinny has a little different whinny/bray sound from what a mule sounds like. It is more like a squeaky whinny where a mule has more of a squeaky bray.
I think hinnies are a little easier to train. I am not ready to say if they are as smart as a mule or not. I have not had nearly as many hinnies but I would have to say that I think mules might be a little smarter and hinnies train a little easier.
I do not think there is much difference in size. Both usually are quite a bit bigger than their donkey parent. I know some people think hinnies have better withers, but all of the mules we raised had good backs and pretty good withers. We did not need a breeching or crupper unless we were going to steep mountains. I used to just un-buckle my back girth and run it behind my mule's butt when I hit an occasional steep trail.
Last edited by Cherie; 11-05-2012 at 08:49 PM.