the production schedule for animated films was extended over a much longer period than for comic strips. On March 17, 1938, they introduced Bolivar, Donald's pet St. Bernard. The strip found humor in the fact that Bolivar rarely listens to his owner. Taliaferro's design was based on the St. Bernard in the 1936 Mickey Mouse film, Alpine Climbers. On October 17, 1937, Taliaferro and Osborne introduced Huey, Dewey, and Louie, based on a film that was in production at the time, Donald's Nephews. Taliaferro actually proposed the initial idea for the film, so that the studio would have duck counterparts to Morty and Ferdie Fieldmouse, the nephews of Mickey Mouse. Gus Goose, the "lazy and gluttonous" cousin of Donald, was introduced on May 9, 1938, almost a year before Gus' film debut in Donald's Cousin Gus, that was still in early stages of production. On November 4, 1940, Taliaferro and Karp introduced a comic strip version of Daisy Duck, as Donald's new neighbor and love interest, shortly after her film debut in Mr. Duck Steps Out (1940). This was Daisy's first appearance in comics, not counting her prototype, Donna Duck, who appeared earlier in the British comics and was later introduced by Taliaferro and Karp as Daisy's rival. Grandma Duck, Donald's grandmother, was introduced on September 27, 1943, and was created for the comic strip by Taliaferro and Karp. Taliaferro based the design of the character on his mother-in-law and her old-fashioned ways. Taliaferro's version of Grandma is a hard-working farmer, but out of touch with the technological progress of the world surrounding her. Scrooge McDuck joined the cast of the comic strip on February 13, 1951, and Ludwig Von Drake on September 25, 1961. Donald's car, the '313', or '1934 Belchfire Roustabout', was designed by Taliaferro on July 1, 1938, from a car that Donald drove in his first titular film, Don Donald (1937). The car has been associated with the character in comics ever since. Retirement Taliaferro retired from the daily comic strip on October 10, 1967. He kept working on the Sunday version of the strip until his death in February, 1969. Since 1967, Taliaferro's duties on the comic strip had mostly been handled by Frank Grundeed, who replaced Taliaferro as the main artist upon his retirement and death. Bob Karp remained the strip's main writer until his retirement in 1974. The Donald Duck comic strip continued