Dec 16, 2015· DIY Animal Mineral Feeder. You Will Need: 50 gallon plastic drum; rim semitruck used tire; 4 46 1/2inch carriage bolts; 8 washers; 8 nuts; Optional: eye bolt, 2 washers, and 2 nuts. The 1st thing you do is optional: Simply drill a hole in the center of the tread of the tire and bolt the eye bolt in .