I do like reading about other people's pets and their stories! It really cheers me up!
I grew up with a lot of animals, so what sounded odd in other people's houses were perfectly normal in mine.
We had a rabbit with anger management problems. I was held hostage on top of the rabbit run for offending her by hanging laundry out (later solved by wearing steel toe-capped wellies so that she couldn't attack my legs). She would hump one of the cats if she caught her. It was not a surprise when the cat brought a wild baby rabbit home with her, as if asking if we'd like to swap the adorable one for our angry one. Another had a thing for humping balloons, so birthdays were fun!
That same cat was a terrible hunter. She'd bring pigeons that were bigger than her home, play with and then massacre voles/shrews/mice/a rat in front of the French doors when we had visitors, etc. Live birds in the dining room while on the phone was not unheard of. We would have to keep an eye out and close the windows if we saw her coming with prey. She's also in the habit of hiding under sheets on the banister rail, and frantically attacking anyone who passes. I was on the phone about a job interview when a mouse skidded out from under the sofa, a paw shot out, and pulled the mouse back under.
Dogs... destroying flooring, running amok with knitting (all around the chair legs and everywhere else!), redesigning my mother's dining table legs, having explosive diarrhoea over freshly-cleaned carpets, rolling in fox poo, eating the contents of the muck heap with delight, and I've had to wrestle dead pygmy goat kid (it was stillborn) from one before now.
One that makes me laugh is a dog on his final walk before being PTS cocking his leg and peeing in a picnic basket in the park. His owner was mortified!
They're not pets, but a farmer I knew had fields that backed onto a housing estate. One had new owners, and a cow smashed through their broken fencing, got into the house, pooed all over their sitting room, headed upstairs, tried to turn around, and fell through the banister. The farmer's wife was mortified, but it tickled everyone at the auction mart the following week!