I housesat for my cousin, and she has a heap of Koi. I went out one morning and there were 4 close to the top, but I didn't take much notice because I was being assaulted by her dogs that are taller than me. Next day, those fish were in the same spot, all swollen and yuck. I couldn't get hold of her, so I rang her brother, and he goes 'Oh my god, I can't believe you killed her fish - she LOVES them, they're like her children!'​ He was trolling me, she didn't mind