Ah, but consider the apple. The purpose of an apple is to get eaten so that the seeds get geographically distributed. The apple is ready to fall--else it won't taste good--so you are not killing it. This is true for most all fruits.
If it weren't for cows and pigs and chickens being so tasty, they would probably not be so ubiquitous, because then humans would not have reasons to breed them en masse.
By this logic, I say we start eating endangered species, creating a market demand and thus an economic reason to breed them.
Good idea, but it's already been thought of - L Neil Smith had Eagleburgers in one of his North American Confederacy novels - developed by a conservationist specifically to encourage the breeding of eagles.
