Miss. Code Ann. § 69-13-9

In open range counties all fences four feet high, in good repair, and substantially and closely built with rails, planks, pickets, hedges or other substantial material, or with wires or wires and plank are lawful fences; and lawful fences may be made by raising the ground into a ridge and erecting thereon a fence of rails, planks, pickets, hedges, wires, or planks and wires, or other substantial material so that the ridge and fence together be four feet high, and such material so used shall not be more than six inches apart.