He went on to apply for the post of office boy in the Holborn shop of James Spratt, the manufacturer of Spratt's dog biscuits. He was recruited by Spratt, who would later go on to say that Cruft had lent forward in the interview at one point whilst talking about the business and said "You know, I think this kind of business ought to do very well, I do honestly." Cruft overhauled the bookkeeping in the shop, changing it from a system using crosses to distinguish between wholesale and retail customers to a far more detailed system. The Maltese cross that was previously used in the bookkeeping was later instead stamped onto the biscuits as a type of trademark to distinguish Spratt's biscuits from other dog biscuits.