We had a dwarf horse when I was about 13. Meanest SOB to ever walk the planet.
Seems like small dogs, mini horses and other genetically downsized animals have a more pronounced self protection mode and an unfriendly disposition. Gotta be size related. I really want a small donkey but I don't want to deal with tude.
My neighbor I think sells miniature horses and donkeys and mules. Some if his miniature horses are like literally knee high.
I got my coins ready you greedy bastard so get ready to refill that thang all night long!......