At first I thought this might be a story about wild critters invading through a pet door, and I have a perfect German pet door story at the other end of the cuteness scale. But it looks like these guys just use a window for access. Darn, I'll have to save my story for another time.
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EDIT-- What the hell, I'll tell it anyway. I saw this in the news a few years ago:
So this Bavarian had a bit too much fun at Oktoberfest and had difficulty getting into his home. Maybe he lost his keys. Anyway, he tried to crawl in through the pet-door in his front entrance. He got stuck. He passed out. Some passerby pulled his pants down. Some other passerby (or maybe more than one) inserted flowers into his butt. He was stuck there for three days. Finally, someone figured that he wasn't there voluntarily, and pulled him out. When questioned, neighbors said they thought it was just performance art.
Moral of the story: Beware of pet doors, especially in Bavaria.