Trigger words: acceptable
Indicator sentences: But then again, I am not clear what you mean by "acceptable" - in a legal sense? moral? social? biological?
Negotiation parts: From my experience, many societies (esp. those of North America and western Europe) find the practice of pet eating to be morally reprehensible.
Trigger words: created
Indicator sentences: I believe you mean domesticated, the human race did not invent dogs or cats.
Negotiation parts: Exactly. We created dogs and cats by selectively breeding the traits we wanted. One of the criteria was companionship. That's why it's so particularly cruel to eat them.