It's called processing because killing the animal is just the first step. Next you have to systematically dismantle their body and cut up the usable bits into m

It's called processing because killing the animal is just the first step. Next you have to systematically dismantle their body and cut up the usable bits into manageable chunks, which (I'd assume) is a bulk of the work. Personally, I think the word processing is more vile in this context than simply killing. That said, I also eat meat, so I can't really say much.