Okay, I’m peeking through comestibles.json of a recent git, here’s what I see:
[ul][li]jerky has nutrition 12, quench -3, morale +4; it never goes bad, and gives you 3 servings per recipe.[/li]
[li]canned meat has nutrition 50, quench 0, morale +2; it goes bad 40 hours after you open it, but the recipe makes a “sealed jar of canned meat”, which isn’t actually a comestible at all, thus never goes bad.[/li]
[li]meat slices have nutrition 25, quench -5, morale +2; they go bad in 48 hours after you open them, but again, the recipe makes a “vacuum-packed meat slices”, which again isn’t a comestible and never goes bad.[/li][/ul]
The meat slices recipe also gives you two servings, so is nutritionally equivalent to the canned meat, however the canned meat doesn’t make you thirsty; this may not matter very much, as it’s a fairly low amount of thirst (by comparison, a serving of clean water has quench 50; easily enough to cover for a mere -10 from the meat slices).