A Californian study of horses withdrawn from endurance competition for emergency veterinary treatment has identified the complaints involved.
Australian rider Shauna Larcombe has won a four-star reining compeition in Lyon, France.
Fat and obese horses are now at epidemic levels in Britain, the charity World Horse Welfare has warned.
A clean jumping round sealed victory for Stuart Tinney and Vettori in the Australian International 3-Day Event, with Megan Jones filling both second and third placings.
The 18 riders who had qualified for the Global Champions Tour Final in Doha, Qatar were in no doubt from the moment they started to walk the course that they would have to work hard to win the biggest prize in show jumping.