*Briefly breaks surface, just in time for bedtime*
Something noncontroversial then!
From what I've gathered from hunting communities, even in a cold environment a kill is no good after 24 hours. The Expedition can try to experiment with feeding bad meat to their heavy-hitters, but nobody's really keen on the idea.
Speaking personally as a hunter... it really depends. Your immune system plays a big part. If you've eaten frozen, vacuum sealed meat your whole life, and you regularly wash your hands, your immune system is going to be far less hardy than some nutter who lives in the woods and leaves his meat on a drying rack in the woods. Our knights of Taal would probably be able to gamble on meat that's been left out for two days with good odds of nothing worse than feeling slightly queasy as long as they cooked it thoroughly before eating. You can find some time lapse videos of meat decay on youtube which are fairly illustrative.
Animals such as their mounts? 3 days should be fine, not ideal, but fine; anything older than that is rolling the dice unless you doused it in salt or smoked it. Scavengers on the other hand can eat some very nasty stuff with few ill effects.
There's also an option of cooking the meat on the go; boiled will probably last week in this climate, not counting dhar poisoning.
The main parts here are:
-Offal, brain and viscera - This goes bad
really quickly, and will spoil everything it is in contact with. However the viscera are also the most calorie dense parts short of the fat, feeding them to obligate carnivores is a great idea.
-Fluids - Blood, bile, all the miscellaneous juices. These are not intrinsically easy to spoil, but being liquids, if any part is contaminated, they will rapidly ensure that every part touching the liquid will be in short order. Drain and dispose unless you know what you're doing.
-Fur and hides - Spoils very slowly. Very limited nutritional value. However, they can trap fluids, so remove. There's probably some use for rawhide, but in the worst case they're edible enough.
-Bone - Does lose nutritional value over time, but has rather limited amounts of what you can get. Given water and heat, you can make bone broth/stew to stretch other food supplies, and the resultant broth can keep fairly well, even if its not especially nutrient dense. Takes a lot of boiling however, so watch out if water and fuel may be short.
-Fat - This actually keeps fairly well once cooked and represents a very large amount of calories, if disgusting to eat on its own. Emergency food, or padding for high volume,low calorie foods. After all, almost anything's palatable once deep fried in lard...
-Muscle - This keeps pretty good if dried out or smoked, both of which we have many means to do so with. Jerky is likely the most palatable long term foodstuff.
