Dogs do not generally need overly strong fencing. The size of the openings in the wire mesh are the most important thing to consider. Smaller openings at the bottom are very important. For larger breeds, using a fence design with larger openings can save money.
Install the wire according to the manufacturers recommendations for the maximum post spacing. 12 to 14 feet for S-Knot, 20 to 30 ft for Fixed Knot.