Probably why carnivores eat the stomach content of the herbivores they have killed.
That is not a universal behavior for all species in the order
Carnivora. Dogs/wolves and other species of genus
Canis do so, but they do it to get the bacterial culture. (That's why your dog will eat stool if you feed him cheap commercial kibble loaded with preservatives that kill the culture in his very short intestine.) Still, almost all Canis-clade carnivores (as opposed to Felis-clade) are scavengers as well as carnivores. Foxes, bears, raccoons, ferrets, etc., will happily eat fruits and maybe even a bit of the same disgusting detritus that dogs eat, and that's probably how they acquire some of their vitamins. (I don't know that much about the pinnipeds.)
Nonetheless we cannot generalize the biochemistry of carnivores to our species of primate. After all, by definition the tissue of a mammal contains all of the vitamins and minerals a mammal needs to survive, assuming you eat the organs, skin, etc. Lions and hyenas and otters and skunks may have all the right enzymes to extract them, and perhaps humans don't.
ANY animal an Intuit eats (with the possible exception of a baleen whale) will have nothing but meat in it's stomach and gut.
All cetaceans are carnivores, which is amazing considering that they descended from primitive hippopotamuses and therefore have been recently reclassified as artiodactyls--with the cattle, camels, giraffes, deer, sheep, pigs, etc., most of which are industrial-grade herbivores. Baleen whales eat krill, which are teeny-weeny shrimp.
BTW, it's
Inuit. Intuit is a software company.
Yes, you're right - [reindeer] IS another exception. And I'm uncertain about the number of them killed or about how MUCH volume there is in the stomach to be shared by a family or group of people. But it couldn't amount to much in comparision to the amount of meat.
The Inuit are not pastoral nomads and do not herd reindeer. You're thinking of the cousins they left behind in the north of Eurasia like the Sami ("Lapps"). Nonetheless I would imagine that some of their tribes do hunt caribou, which are merely a different, undomesticated population of the same species living in North America.
In which case, the contents of the digestive tract of any artiodactyl will be full of partially-digested food. Digesting cellulose is an arduous process that requires the assistance of billions of bacteria with the specialized chemistry to break it down and convert it to protein (i.e., more bacteria). They have a two-chambered stomach that keeps the food churning. Cattle have a four-chambered stomach, and over and above that they regurgitate their food, chew it some more, and start over.