Electric Earthquake (1942) is the seventh of seventeen animated Technicolor short films based upon the DC Comics character of Superman.
https://en.wikipedia.org/wiki/Electric_Earthquake
The film features Bosko working on a construction site with a goat and several small mice (all of which bear a strong resemblance to Mickey Mouse; Harman and Ising had worked with Walt Disney for several years before joining Warner Bros.).
https://en.wikipedia.org/wiki/Hold_Anything
Battling Bosko is an American animated short film. It is a Looney Tune cartoon, featuring Bosko, the original star of the series.
https://en.wikipedia.org/wiki/Battling_Bosko