Coffey's first role in animation appears to have been in Tom and Jerry's Little Quacker (released January 7, 1950), and he subsequently was hired to play the little duck in another six cartoons between 1953 and 1958. After William Hanna and Joe Barbera left MGM and opened their own studio in 1957, they hired Coffey to play a duck similar to Quacker in cartoons such as Slumber Party Smarty and Duck in Luck with Yogi Bear, and Augie Doggie and Doggie Daddy, Pixie and Dixie and Mr. Jinks and Loopy De Loop.
Coffey's initial position in animation seems to have been in Tom and Jerry's Little Quacker (released January 7, 1950), and he subsequently was hired to portray the little duck in another six cartoons between 1953 and 1958. Following William Hanna and Joe Barbera leaving MGM and establishing their own studio in 1957, they employed Coffey to play a duck similar to Quacker in other cartoons such as Slumber Party Smarty and Duck in Luck with Yogi Bear, and Augie Doggie and Doggie Daddy, Pixie and Dixie and Mr. Jinks and Loopy De Loop.