Thinly Slice The Deer Chops And Brown Them In A Heavy Skillet Over Medium-High Heat. Transfer The Meat To A Slow Cooker. Mix In The Ketchup, Water, Onion, Brown Sugar, And Dry Onion Soup Mix. Cook On Low For 6 Hours Or Until Tender. If You Want To Cook It In A Roaster, Bake At 350 Degrees F, For 1 Hour.