When war broke out, he was commissioned by Gaumont to produce a series of short films called Studdy's War Studies. Studdy later introduced Bonzo into his sketches. His Bonzo character was a chubby little white pup with sparse black spots, a stubby tail, and big blue eyes. Bonzo became the inspiration for much commercial merchandise, such as cuddly and mechanical toys, ashtrays, pincushions, trinket boxes, car mascots, jigsaw puzzles, books, calendars, candies, and a profusion of postcards.