Midget, the not-overly-tall chestnut quarterhorse, seemed very interested in his dinner Saturday evening as he followed a trail of grass and happily munched away. But a good backscratch also appealed, so in the middle of feed time, as Amber Moody of Aiken, S.C., led him around a grassy field at 4-T Arena, he dropped to the ground and rolled around onto his back.