Hello, what is HERDA? Thanks for all the info everyone!
HERDA stands for heredity equine regional dermal asthenia.
It basically is a gene that is commonly found in AQHA & APHA horses. When you come across a horse that affected with HERDA you'll notice that their skin doesn't seem to be attached to their body like it should. They get lacerations very easily, when the injury heals it looks very sloppy.
AQHA's youtube channel has a terrific video of HERDA if you want me to fetch it for you. Usually horses affected by HERDA don't live past the age of 4.