HDPE Livestock Fencing Products - 2, 3 and 4 Rail Fence for LivestockHDPE Livestock Rail fencing - The Best 2, 3 and 4 Rail Fence option for livestock & animal containment - Safe & Durable - 20 Year Warranty. ... EXPERIENCE. Derby Fence Co. was founded in 2006 by Christopher Arendt, President and owner of Lakeland plastics, Inc., one of the leading custom plastic extrusion companies in the United States. ... Your animals will be safe inside Derby's HDPE horse fence products and you will be choosing an environmentally friendly fencing option.