My cat door has a new battery in it. It's ABOUT TIME! For months and months I've been getting stuck outside, and all the time it was merely the battery that needed changing.
What does a cat door need a battery for? Well, it's to do with the magnet around my neck, that triggers a small mechanism in the door latch that allows it to open. When I come close, the latch is released and I can nudge it open with my head. The point is that none other of those pesky felines who keep invading my garden can get through the door. It's mine. All mine. Mine alone.
And praise be to the cat gods that my door worked today, for it was freezing. Spring was flushed out by a major gust of winter. Brrr.