Fans of the film Withnail and I, which surely includes every reader of TDN, will be all too familiar with Withail's immortal line: "We've gone on holiday by mistake." Dave Lowe could claim similarly that he became a breeder by mistake. As mistakes go, however, it has been one with a joyous outcome, for Lowe is the owner/breeder of one the most spectacularly progressive fillies in training. Sparks Fly (GB), a daughter of Muhaarar (GB), is out of a mare whom Lowe raced in partnership with friends. Named Stepping Out...