Cattle fence comes in a variety of styles, and the choice you make may depend on the type of livestock the owner is. Cattle and horses are kept enclosed with barbed wire, while sheep and pigs usually need a woven wire fence to keep them in their pens. In the case of pigs, a row of barbed wire under the woven wire can prevent it from rooting its way out of the pen. Once you understand how to make a straight row of fencing, you can easily complete the entire pen. Mark the row of the fence.