By Pat Forde A practice run Saturday will determine whether Rich Strike will race in the second leg of the Triple Crown. Said trainer Eric Reed: “I can’t do anything but what’s best for the horse.” LEXINGTON, Ky.—Just about everyone has assumed that miracle Kentucky Derby winner Rich Strike’s next race will be the Preakness Stakes on May 21. The horse appears to have bounced out of the Derby in good shape, and thus is compelled by tradition, market forces and the allure of a Triple Crown to contest the second leg in Baltimore. But on this idyllic patch of land off Russell Cave Road where Rich …