Bugs Bunny Animator Bob Givens Dies at 99 Givens worked as an animator for Disney, Warner Bros and Hanna-Barbera. The animator started working for Disney right out of high school in 1937. Givens was known for drawing Tom & Jerry, Daffy Duck and Popeye. He also redesigned Bugs Bunny. Givens took a break to serve during WWII, before returning to work.