The San Diego Humane Society is investigating the death of a horse that took part in last month's rodeo at Petco Park, officials said Monday.

The San Diego Humane Society is investigating the death of a horse during last month’s rodeo at Petco Park to determine whether negligence or criminal intent played a role. The investigation comes as the Humane Society and animal rights activists continue to lobby San Diego officials either to ban rodeos within city limits or to significantly restrict how animals can be treated during such