Jess Jackson, owner of Stonestreet Farm and majority owner of 2007 Horse of the Year Curlin, testifies before Congress on June 19, 2008.

Jess Jackson, owner of Stonestreet Farm and majority owner of 2007 Horse of the Year Curlin, testifies before Congress on June 19, 2008.

AP Photo/Susan Walsh

Industry on Notice at Start of Hearings

House subcommittee looking into issues of drugs and safety.