Mr. Terry! Mr. Terry! I have another great idea for a cartoon.
What’s that, Tommy?
There’s the house cat, you see, and this circus animal comes into his home, and he mistakes it for a giant mouse. And the giant mouse keeps beating him up!
Tommy, that sounds like...
Oh, no, Mr. Terry. The animal isn’t a kangaroo. It’s an elephant.
Well, that’s good. As I always say, “Never steal more than you can carry.”
Okay, the dialogue likely didn’t happen. But it is a fact that Bob McKimson’s giant mouse appeared in
Hop, Look and Listen (1948),
Hippety Hopper (1949) and
Pop 'Im, Pop (1950) on theatre screens before Manny Davis’
The Elephant Mouse (1951), written by Tom Morrison for Terrytoons.
One thing McKimson did not have was Jim Tyer. Now, I’m not any kind of expert at identifying animators, but I feel safe in assuming the animation below is by Tyer. He doesn’t do a simple head turn on the cat. Look at the way the head sweeps.



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Love the Terry Brake Squeal? It’s in this cartoon. Love the imitation Ed Wynn voice that Gandy Goose had? It’s in this cartoon? Like the routine where alley cats, who don’t believe there’s a giant mouse, shove their buddy cat back into the house? That’s here, too. (In fairness, the brake squeal is from a production record. Bob and Ray used it on radio, too).
Evidently, Paul Terry was looking for new stars. He tried Dingbat. Dingbat lasted five cartoons (see note in comment section). This was the second cartoon starring Half Pint (who gets his own title card). It was the last one.