My and my sisters painted our cat when we were really young. I think my parents had to shave him after that (I was really young and don't remember doing it, but they've told the story a number of times.)
Another cruel yet funny story is that my parents used to have a couple chickens, and one time they let all the eggs hatch so there were a bunch of baby chicks. I should also point out that we all learned to swim very young, so it wasn't uncommon to be left by the pool for a little while. Anyways, one day my mom goes in the back yard and finds my sister sitting on the edge of pool with a pile of dead chicks next to her. My sister then picked up one of the chicks, put it in the pool and says "Swim duck, swim duck"
We also had a couple sheep named "Lamb" and "Chop", one day we came home from school to find the sheep gone, but the freezers full of food

I had an odd childhood, but a good one.