Actualy all food that's been afco aprooved has been tested on dogs but that's just a food trial and doesn't mean much except the animal ate it for a few months and most of them didn't die.

And as for carnivores in reality they tear into the belly and tear out the stomach and leave it then eat the other organs first. They really don't want that. It's only little carnivores like cats or foxes that eat the whole thing because they'll eat the whole mouse or whatever in just a bite or two.