Getting creative to keep the Fens in the house and not in the garage

Fenway has been getting through the cat door. Husband and I were continually putting in the cat door block to keep Fenway in the house and out of the garage......and counting down the days until he grew too big to fit through the door. Today, clever husband duct taped the door shut so kitty can get outside and The Fens can only get out a little.....