@Robert Gentel,
There are so many reasons why people quit eating animal products - health, moral, ethical. I quit eating beef several years ago, but we still eat chicken, lots of chicken. I'm thinking of giving up the chicken and turkey. So, what to eat is the question. My husband quit eating beef, along with me at first and then because he felt better, then because he now can't digest red meat. We both hate red meat now. The sight of it is disgusting.
Now, I'm having trouble looking at a plucked chicken, ready to be popped in the oven. The kids were here last Thanksgiving and, as I pulled the legs together, tied them, I said to daughter-in-law: "Poor thing" (the turkey, that is). We may have to re-think eating chicken and figure out another diet sans poultry altogether.
Adding to the comments, if my neighbors served up a cat for dinner I would think they were insane. Me, I know, I'd call the Humane Society. Can't imagine anyone eating a dog, like the Chinese. Just thinking of the French eating their horses makes me quake and shiver. Horse lovers fought so hard to prohibit horse meat packing factories here in U.S. only to find they are now shipping them to Mexico where the slaughter is more cruel, that " last ride" horrible. The French must have their horse meat. Maybe my doggies eat horsemeat out of cans.
I agree with your statement: If we must determine which animals are acceptable for food, that alone is good case for giving up all animal consumption. But it is a personal decision.