All of these reprints appear to be recolored, and are missing the "[character name] appears in [whichever] Comics" bullet that generally appeared in the last panel of each story in their original forms.
Probably reprinted from 1930's Chesler Publications, Inc. material.
Madden is credited on Mother Hubbard by Jerry Bails' Who's Who, and this artwork match some other features credited to Madden, like "Rocket Boy", "The Unholy 3" and "Dynamic Boy". Initials signed yellow below twigs in first panel.
K-9 is gray in this reprint while he was brown in the original printing.