I send a giant spider at my players, who at that point have gone through most of their rations. And then one of the player announces, "we eat the spider". What do you think, should eating monsters be allowed, or should it require some kind of survival, or craft: cooking check or something similar?
In another place, the characters invoked the ire of some of those sentient ostrich creatures. Now, because they killed them rather swiftly and decided not to investigate what they just killed (which I had expected them to do), they did not realize they killed something sentient. So, the character announces, "We cook and eat the ostrich things." Same question as before.
To add to the predicament, I have a werewolf. Wolves are known to eat raw meat and survive. It seems to me that werewolves can do so, too. Or else their Bite attack would be problematic. So, should that werewolf be allowed to just devour anything they kill, except maybe for acidic oozes?