M-G-M's Leo the Lion does four extremely short, quick roars, one for each kitten, to the tune of "Hold that Tiger". This unique event occurred only twice, in Blitz Wolf (1942) and Chips Off the Old Block (1942). 21 days (3 weeks), separate their release dates. Tex Avery's Blitz Wolf (1942) was first, on Saturday, August 22nd, 1942. Rudolf Ising's Chips Off the Old Block (1942) was second on Saturday, September 12nd, 1942.