Animal Kingdom, winner of the Kentucky Derby, runner-up in the Preakness, and one of the leading contenders for 3-year-old championship honors in the upcoming Eclipse Award voting, had his first posted workout during his comeback from injury on Dec. 24. The soon-to-be 4-year-old colt by Leroidesanimaux breezed three eighths of a mile in an easy 38 seconds flat at trainer Graham Motion's farm in Fair Hill. The Derby winner could make his return before the close of the Gulfstream Park meeting.