Moondog should be saying to Pilsner the Parrot, "Meet me at the card table in four". Monty by Jim Meddick.
Giving their human characters only 4 fingers seems to be a stupid tradition some cartoonists can't get away from. Another comic strip with 4-fingered humans is Foxtrot.
Comics strips with 5-fingered humans include Zits, Zippy and The Fusco Brothers.