Robert McKimson's "Mouse-Placed Kitten" features the common storyline of a baby with the wrong parents. In this case, a kitten ends up in the care of a mouse couple who eventually decide to deliver him to humans to raise. When they go to visit him a year later, an awkward situation arises.
The Looney Tunes had obvious passed their prime by this point - it was going to be hard to top "What's Opera, Doc?" - but it's still a mildly fun cartoon, banal though it is. One thing to note is the voice artists. Mel Blanc of course voices the cat and the father mouse. Voicing the mistress and the mother mouse is the recently deceased June Foray, best known as Rocky the Squirrel (she also voiced Granny in the Sylvester-Tweety cartoons). Her voice acting was so prominent that she even got a mention in the In Memoriam segment on the Emmys in September. As I heard it described, June Foray wasn't the female Mel Blanc; Mel Blanc was the male June Foray.
Anyway, not a great cartoon, but OK.