By 1955, Bill Hanna and Joe Barbera were having troubles trying to keep the Tom and Jerry series fresh. On top of that, animation had changed. The great Disney-type personality movement that made the cat and mouse so appealing in the ‘40s was being replaced, partly thanks to UPA. By the mid-‘50s, The two seemed to stare with their lower lip out a lot of the time.
In the ‘40s, Hanna and Barbera had used a Beulah-type maid as a third character for Tom and Jerry to play off. That type of character was o-w-t in the ‘50s. Bill and Joe used a menagerie of other animals but became obsessed with a little duck, who was plotted into at least seven cartoons.
I loathe this character.
In
That’s My Mommy, the stupid duckling believes Tom is his mother (the duck has a mommy fixation in most of his cartoons), even after Jerry points out in a book what a mother duck and a mother cat look like (he actually never catches on during the whole picture).
Here are some drawings from the one real take in the short, when the duck realises he’s the key ingredient in his mommy’s duck stew. It ain’t ‘40s-type Tom-and-Jerry animation by a long shot, let alone something outrageous like Tex Avery would have tried.


Now a head shake and another take.





The cartoon ends with Tom taking pity on the pitiable duck (rivers of tears flow from the cat’s eyes) and deciding not to eat him. The last scene shows Tom swimming with him, just like a loving mommy.
The duck, of course, was re-used by Hanna and Barbera in the Yakky Doodle series, and there was even a cartoon where Fibber Fox decides not to eat the duck, but be his mommy instead.