The group also alleged that “extremely stressful conditions” contributed to a horse death June 25 during filming of the cable TV series “Boardwalk Empire.”
HBO, disputing the account, cited a necropsy report showing the horse had died of natural causes. AHA also called PETA’s account untrue, adding that the horse was 21 years old, was used in a background scene and had not been given any tasks to perform. AHA did not specifically respond to other complaints.

