A jury yesterday awarded nearly $7.8 million to the family of a jockey killed at Parx Racing after a race horse - spooked by roaming chickens - threw, dragged and kicked him. Mario Calderon, 55, of Croydon, Bucks County, died after suffering 11 broken ribs and a bleed on his brain in the May 2010 mishap at the racetrack formerly known as Philadelphia Park, according to his attorney Michael A. Trunk.