Cat Door for Interior Doors with Locking Knob and Flapless EntryA Little Door for Cat Adventures Cats often move between rooms for feeding areas, litter spaces, and quiet rest spots. This interior cat door creates a small passage through a standard door so cats can move between rooms without the door being fully open. The rounded gnome style design features a flapless entry and a small window detail, turning a regular door into a recognizable pathway for daily routines around the home. Built Like a Vintage Doorway