Raw Mutton drops from Ovis (sheep) corpses in ARK: Survival Ascended. It's extremely effective for taming carnivores - comparable to Prime Meat but easier to stockpile by breeding Ovis.
Node yields assume the base harvest HP from game data (e.g. 1000 for Redwood trees, 620 for Metal nodes). In-game, trees and rocks with bAllowHarvestHealthScalinghave per-instance HP that varies with the node's size, so actual yields per node will vary. The values shown represent the average.
These creatures reduce Raw Mutton weight when carried in their inventory.
The Giganotosaurus is an effective Raw Mutton harvester. The Mek is another good option. Rankings are based on actual game file data.
The following creatures reduce Raw Mutton weight when carried: Maeguana (-50%), Maewing (-50%). This means they can carry more Raw Mutton before becoming encumbered.