I'm happy to report that Wildhorse Ranch Rescue has intervened.
"As of October 2014, we began taking horses and mules in need out of the Havasupai Falls area. When they get to our ranch, they need:
- Medical Care and Xrays
- Dental work
- a very carefully selected diet
- Their feet trimmed
- Grooming and lots of love"
See their post here. (Click here.)