This research was supported by the UC Davis Cen- ter for Equine Health with funds provided by the State of California satellite wagering fund and con- tributions by private donors.
Declaration of Ethics
The Authors have adhered to the Principles of Veter- inary Medical Ethics of the AVMA.
Conflict of Interest
Dr. Rebecca Bellone serves as the Director of the UC Davis Veterinary Genetics Laboratory. This labora- tory offers genetic diagnostic testing in horses and other species. The other Authors have no conflicts of interest.