Chauncy, ridden by Suzy Elliott, collapsed while competing in the advanced division at The Event at Rebecca Farm, Kalispell, Mont., on Saturday, July 24. Elliott is from Yelm, Wash.

Elliott was riding Chauncy, an 8-year-old Thoroughbred gelding owned by her husband, Jonathan Elliott.

Chauncy collapsed following a second run out at fence 16A. Elliott dismounted before Chauncy collapsed. A full paramedic and veterinary team were present within moments after the collapse. Chauncy was taken to LaSalle Veterinary Hospital, Kalispell, Mont., for a necropsy. The necropsy revealed a cardiac hemorrhage.