First one should understand that any slaughter house seems horrible. Yet, the Jewish method of slaughter is painless. The knife must have no nicks or breaks. The organs are examined. Certain blemishes renders it unkosher. Then the meat is washed in water. Then soaked for half an hour. The meat is then salted, completely. This is done because Jews are forbidden to eat blood. Liver contains a large amount of blood and has to be roasted over an open fire. Some non Jewish people do buy kosher meat products because it has no hormones. Meat products like hot dogs also have no insects accidentally ground in. As I understand it, non kosher ones are allowed by the FDA to have so many insect parts per square inch. Jews are prohibited from eating insects. Many red beverages use beetle juice for coloring and as such cannot receive a kosher symbol from any reliable group. Kosher is a very involved matter. Prohibitions of cruelty to animals is only one aspect of a huge topic.