Survival
Your skill in wilderness survival. This helps you butcher meat from a corpse and craft various basic survival items. High levels may allow you to remove poison from tainted meat. Also used for skinning corpses to acuire pelts. For a more efficient butchering you'll need this skill at level 3, dexterity at 8 and strength at 4 or higher.
Apart from reading books on the subject, you can easily raise this skill by butchering corpses (including those of zombies), crafting stone hammers and, later, digging sticks and snare triggers.