Equestrian sport has clamoured for clarity around the difference between medication and doping, and the new progressive drugs list is compatible with horse welfare, FEI president Princess Haya says.

Jessie, a Riding for the Disabled horse whose skull was fractured by a hammer blow between the eyes, is well on the road to recovery.

More than 860 horses in the United States have so far been tested for the tick-borne disease, equine piroplasmosis, as authorities work to eliminate an outbreak centred on Texas.

Four of eight US states affected by an outbreak of the equine venereal disease, contagious equine metritis, are now considered free of the disease.

World Horse Welfare has been chosen as the charity of the year for the 2010 Badminton Horse Trials.