Now as far as killing for the joy of it... well there are lots of exceptions there too. I have seen a video of a pod of Orca killer whales playing with a seal. They tossed it back and forth like a badminton shuttlecock. I have also seen videos of lion cubs toying with a small tiny antelope calf... literally biting it and tormenting that thing, but they had already eaten because their mother killed the mother of the antelope; which brings me to my favorite cat. My Himalayan cat I bought in 1982... a beautiful Blue point Himalayan long hair. Anyhow, she was the sweetest thing around humans, she would rub against your legs, demand to have her neck scratch, and every morning she would jump into my bed and sit on my chest and purr like a well tuned sports car until I got up and fed her. I never own a sweeter animal for a pet. But my God, she was the most wicked, mean, merciless huntress that would kill for the joy of it. I over fed that cat so she never needed to kill to eat, she was also finicky eater, but if she ever saw a small animal, a lizard, or a mouse, she would catch it and toy with it until it was dead. Never ate anything she caught. The first time was in Florida when she caught a series of lizards. We have these small brown anoles all over the place in Florida. She would catch one and gnaw off the legs and feet alive. Then other times she was really good at just playing with it. First time I realized how dexterous house cats were with their claws. She caught one and she would wear it out. She would allow it to escape, and then swipe at it and with one claw extended like an index finger, she nailed the lizard and dragged it back. She would do that over and over again tormenting that lizard. One time she caught a mouse, and played soccer with it. I though she was playing with a sock ball out of my laundry basket. But no it was a mouse that she tortured to death and then dropped it by my feet.