Barbed wire is an inexpensive fencing option, most commonly used for pasture areas to keep livestock confined to specific areas. Barbed wire, used in conjunction with woven wire, prevents large animals from breaking down fences and can keep smaller animals from digging under the fence. If the fence is for cattle or horses, four-wire barbed wire is most common. The upper strands of barbed wire can be removed if the fence is meant to contain hogs. Barbed wire fences can also be used to border crops to prevent large animals from getting in and wreaking havoc.