Your point about being housebroken was shown to be wrong. Your point about fetch was shown to be wrong. No one is saying a cow is a dog. You are being deliberately obtuse to avoid the unpleasant idea that cows are just as sentient and loving as many dogs (most dog breeds are smarter than cows but some breeds are stupid). But for cultural reasons we don't eat dogs.

I'm not vegan either but I recognize the horror.