Olive, my DS1’s favourite food is crispy fish skin. When he was about 3 he said to the goldfish “I want to eat you and eat your skin”. Then when it died (when he was about 3 ½) he said “Can we eat him now?”. Sorry, that probably hasn’t helped you at all, but I just wanted you to know that my DS1 was certainly aware of the concept of killing, death and eating at an early age.