Originally Posted by farmpony84
I've known a few blind apps myself. Is it genetic?
It is genetic; I don't own appys so I don't know which blood lines it runs the strongest in but I have noticed that leopard appys tend to get it the most and the earliest.
It is like any animal that is severly inbred; friesans are known for having bad respitory systems, and arabs have club feet and are more prone to neorological problems.
As for the person who wanted to know about foundation lines, you have to learn your bloodlines like any other breed. Do a lot of research to figure out who the main sires and mares are that contribute to the foundation horses.