Some steak-of-the-art snobs say that the mere ordering of steak in a restaurant is an art form. Others apply the term "art" to proper grilling. That's overkill. But we can all agree not to emulate my friend's request that a waiter serve his steak tartar "medium rare."
In exchange (ultimately for their lives), they received protection from predators, assistance in bearing young and even rudimentary health care. What would become of our domesticated animals if we were to stop eating them?