Certain animals can be herded then slaughtered for hides and meat, using the correct tools; the hides can be tanned into leather in tannery pools, then cut into smaller pieces if needed; the meat can be cooked to give more nutrition, or salted to preserve for stockpiling or export.
The herding crook can be used to move animals away from your character in the default mode, and with the alternate mode to stop and attach them to a nearby heard; animals will periodically go back to following the herd leader, so you should try detect which one that is and concentrate on herding it.