"If you have a dog and a cat in the same house, in a single house, and the dog kills the cat, that's not good." While one young person (in earth years) can observe some real life dog and cat interactions and see that a dog who nips and chases a small cat about could theoretically if not actually end the cat's life (of "kill the cat"), many people would want to let that be a simple fact of nature or in civilized countries trust that if the dog were trained basically that would not happen.
What might this indicate for your average two people in a home, sharing a space as friends, housemates or