Suspect pigs and boar (and other animals too) did have a different reputation back in the Neolithic. It's not such a big step from wearing parts of an animal (taking on its attributes?) to eating it for the same reason. Wasn't (isn't?) cannibalism more about that - taking on the attributes of the dead person rather than any need for a protein fix?).

Very interesting subject - must be a book on it somewhere. You're right about it being easier and safer to catch a herbivore than a carnivore but are all herbivores suitable for the table? And if not why not? As for evidence (or the lack of it) of gnawed dog bones from the Neolithic, that does seem to indicate they weren't on the menu at the time. Chilli sauce? Well, being organic in nature I wouldn't expect much of that to survive anyway ;-)