‘The Secret Lives of Waldo Kitty’, 1975. ‘A meek and mild kind of cat.”
Filmation produced 13 episodes of The Secret Lives of Waldo Kitty and they originally ran from September through November 1975 on NBC Saturday Morning. The show featured two live-action cats, Waldo Kitty and Felecia, and followed their attempts to outsmart a live-action bulldog named Tyrone. An animated segment would ensue wherein Waldo would become a character similar to famous heroes such as The Lone Ranger or Robin Hood. Returning to live-action, the cats would outwit Tyrone and enjoy watching him get into hot water with his owners.
Does this one strike your kitty memory bell at all? I have a vague memory of it but I was busy watching other shows which likely ran opposite it such as The Great Grape Ape or Speed Buggy.