Gray horses are prone to equine melanoma. This gives Przewalski's horse the highest diploid chromosome number among all equine species. Hartpury Campus provides training in animal sciences, sport, equine, agriculture and conservation. Hoof care is most well-known with the equine industry. Ovarian tumors have been reported in equine mares. The Friesian is also among several breeds that may develop equine polysaccharide storage myopathy. Animals that would serve as predators of these equine species would include lions and wolves. The USEF breed standard requires Arabians have solid bone and standard correct equine conformation. Reducing friction is also of great help in preventing equine saddle sores. Goats were harnessed and driven by children, much like harness racing in equine sports. College facilities include greenhouses, farms, ranches, and an equine center. A fundamental principle of equine conformation is "form to function". Jameson is turned into a humanoid donkey (a human body with an equine head). Viruses that cause equine influenza were first isolated in 1956. Other advanced labs include the CHILL radar facility and a research lab in equine sciences.