Not all taking of life is equivalent. If it was equivalent I'd be shouting ''murderers!' or some such other thing. The fact that I'm not indicates my understanding and agreement with this point. The fact that I value the lives of chickens while also eating them whilst knowing what goes into their production also indicates this. What it does not indicate is that the killing of something, even the ''needful'' killing of something as you put it, or if it's simply justifiable instead, doesn't mean something wasn't killed. Something was. Or many somethings were and will be. That the killing is deemed acceptable by us matters not a whit as far as the life ended is concerned. It was still the infliction of end-game suffering. That's why I'll include abortions in the fatalities, understanding full well people view deaths by mass shootings, traffic accidents, tobacco usage, and abortion(or even eating chickens) all differently from one another. The benefits from tolerating the losses vary, the costs of enforcing reductions vary, the tally and toll society bears by prioritizing convenience, or pleasure, or freedom over different types of life differ.