This is why I won't have a cat flap. And why Rocket is either an outdoor cat or an indoor cat. He's not going to be going in and out. Which is what he'd like to do, of course, dragging his catch into the house. You don't really realize how messy that can be until you've confined him to dispatching his catch on a concrete garage floor. Then it's easy to see all the blood and guts that would have ended up on the carpet if I had a cat flap.