John and Susan Moore's Iron Deputy, winner of the Count Fleet Stakes, has been taken off the Kentucky Derby trail after a slight fracture was discovered in his cannon bone. Trainer Jimmy Jerkens said the injury was sustained during the running of the Count Fleet."It didn't show up right away," Jerkens said. "He wasn't 100% sound coming out of the race, but he had a cracked heel, and we thought that's what was causing it. But when it didn't get any better, we started looking further and discovered the fracture. It actually was one small fracture running down the middle of the cannon bone and two other small ones branching out from it. Dr. (Larry) Bramlage said surgery couldn't be done and that the injury would heal with stimulation. He's sound enough, and in fact has already started jogging lightly. Iron Deputy had shown a great deal of progress, winning impressively in sprints and around two turns.Another 3-year-old who has been sidelined is the Nick Zito-trained Silent Fred, third in the Remsen Stakes, who is suffering from foot problems. Zito told Daily Racing Form the colt has been X-rayed and it is nothing serious, but it has put him behind schedule.