I worked for while in our local slaughterhouse when I was 16. They killed pigs, cows, and chickens. The cows they shot in the forehead. The pigs, they hoisted up by their hind legs and slit their throats, then lowered them into hot water.
It wasn’t something enjoyable to watch, but it didn’t stop me from eating meat.
Our third grade field trip in school was to the slaughterhouse for cattle being processed into yummy steaks and ground beef