Ned Kelly workout delayed Ned Kelly, the Champion Hurdle third favourite in some lists, will miss an intended piece of work today after a series of weekend results that his trainer Edward O`Grady conceded were 'worrying'. The top hunter, Sheltering, missed a race on Saturday because of a dirty nose. Birmayne, who did run,was pulled up in his race and was found to have a respiratory infection afterwards.Two other O`Grady horses, including Over The Bar, were pulled out of their intended races yesterday, but the one upside for the O`Grady camp was that the Cheltenham bumper hopeful, Pizarro, did win the last.O`Grady confirmed that Norman Williamson will ride the Rhinestone Cowboy for Jonjo O`Neill in the Festival bumper and added that his own Cheltenham team will be filled out by Kickham, Inca Trail and Back In Front.