Crazy Mixed Up Pup is a 1955 cartoon[2] directed by Tex Avery and produced by Walter Lantz.
[4][5] A man named Samuel "Sam" and his dog Rover are both flattened by a car whilst crossing the street.
Both cause strife in their home, which annoys Sam's wife, Margaret "Maggie" and her pet poodle, Fifi.
Sam and Rover are despondent until Maggie comes bounding back on all fours, and Fifi returns in a bipedal stance.
Sam and Maggie bark and bound with joy, while Rover and Fifi embrace, able to converse in English.