Before wire fences were used, the cattle used to walk along the farms and it was impossible to control them. That is why neighboring farmers used to organize rodeos so that each owner could pick up his animals. Different kinds of fences were used according to the areas, they could be made of stone ("pircas"), thorny bushes ("cina-cina"), or prickly pear ("tuna"), it was also possible to find ditches.

The rancher Ricardo Newton, brought from a trip to England in 1845, the first wire fence which he put in his farms to keep his animals inside. Then his neighbors asked him to get the same fences for them so that their farms would also be safely and practically wired. The wire fences are held by hard wooden posts strongly buried in the ground. Seven or eight meters separate the posts but between the posts, keeping a distance of approximately one meter, there are several sticks.

The wires go through the holes that the posts and sticks have. The distance between these holes vary between 0,14 and 0,30 meters, and the distance is reduced as long as the holes get near the ground. The wires are stretched by means of a special tool. The corner post is the one that marks the corner. It is made of hard wood and the end buried into the ground has one or two sticks in a cross held by screws or wires. There are different kinds of wire fences and they are chosen taking into account the way that the owner of the farm will use them.