We EUTHANIZE animals when they are in pain and KILL them when we need them for food; it's called hunting, circle of life, a food chain where we are at the top. As for the abortion topic, you wouldn't kill your hypothetical braindead child if he were out of the womb (do not lie to me, you would do anything to save that child, especially if he were yours), so how is a fetus in the womb with a heartbeat any different?