A lot of protein from meat makes cells break down faster I believe the story goes. So vegetarianism or fruititarianism (veggies and fruits) is actually good for one's health. I believe one could practically live on peanut butter and jelly sandwiches because of the protein in peanuts (don't try this at home, it could be dangerous). Keep in mind though the lifestyles of hardship of moose for instance. Very cold winters, no nerves to feel cold in the legs, intelligence about equal to that of a cat or less. If killed with an adequate bullet the quality of their lives isn't terminated with cruelty. After all when they get old they become prey to predators and torn apart while alive, or they die of cancer without adequate veterinary care. A swift, merciful end of their lives might actually be regarded as a kindness, and honoring their life by eating their meat could be considered respectful, especially with barbecue sauce.
Domesticated animals raised for food might be a harsh experience for the animals. Perhaps not so much for cattle, since their lifecycle is so formulated and terminated. Eating dogs probably is wrong, except humans might be starving or poor and need the protein. I like wolves and don't feel even distant cousins of wolves should be raised to be eaten...that just seems wrong. If people don't have good morals themselves, they aren't much better than animals anyway and the law of nature is to eat anything that can be digested. That could be something recognized by Jesus Christ who said it was ok to eat all kinds of meat. The criterion of humanity is laden with original sin, probably the physical incarnation in a temporal, thermodynamic context is the correction, and everyone in it is doomed if they aren't personally saved. So go ahead and eat meat...it's kind of a lifetime last supper for the condemned and makes no difference on their eternal fate.