 This would have resulted in horses leaving Beijing after the games and having to go through lengthy quarantine processes before being allowed to re-enter their home countries.Hong Kong also had the benefit of having better facilities, including a top equine hospital and one of only a few equine drug-testing labs in the world.The Summer Olympics have included 2,129 equestrian participants, including 1,751 men and 378 women, from 69 countries., of which 564 won a medal.