Only pump food if you want wool.get a breeding pair of them and raise them note that they fall through ceilings and rarely foundations. I have one that has 28k food and it gives me 30 wool every 20 to 30 minutes these are good if you are looking to make some quick ingots or maximize your pelt for those insane fur blueprints. I go on a killing spree and look around rivers and water I find a lot up north past the north found one once near swamp near the intersection
There is an option to kill off a tamed ovis. If you equip a weapon or tool and you open the radial options for an ovis, you get option "slaughter" which kills the ovis instantly. I stumbled apon this wyle drowning them for there meat.