Abstract: A mesh or netting useful for fencing animals comprising a plurality of longitudinal wires mutually connected together in the vertical direction by weft wires, wherein the longitudinal wires as a function of their positions in the vertical direction of the mesh or netting have different strengths. The wires may be arranged in groups wherein the wires strengths vary from group to group. The differences in wire strengths may be obtained by wires having different thicknesses, iron or steel wires of different carbon contents, wires made of different materials or wires having different numbers of elementary wires.