Here’s a Harold Knerr Katzenjammer Kids strip I scanned from 1931. Knerr took over the strip after Rudolph Dirks quit Hearst and went on to do the same strip, different title as Hans und Fritz and then The Captain and the Kids for another paper. You can read the details on Wikipedia here. The scan also includes the Knerr header strip Dinglehoofer and His Dog Adolph.
Please note that this strip contains offensive racial depictions, as was frequently the case with the comics of yesteryear. If this sort of thing offends you, I suggest you do not read it.