Height is probably the most important factor in fencing in fencing out deer, especially in higher (deer) populated areas.  White-tailed deer can jump almost eight feet high, so effective your fence should be this high. 

Strength

Exclusion fence does not necessarily need to be made with the strongest wire available unless you are excluding humans. The Solidlock® 12.5g Fixed Knot is far and away the strongest exclusion fence available and provides maximum exclusion strength. The Solidlock® 14g Fixed Knot is a proven product that works well for many deer exclusion fences where the deer pressure is lighter.

Spacing

Post spacing is another important aspect to consider, for exclusion applications we recommend 15 to 20 feet. Wider post spacing’s can be used where pressure is lighter.

Height

• Deer exclusion fence must be a minimum of 78 inches high
• Preferable  height is 96 inches. 

Knot

• Fixed Knot
• Field Fence: Hinge Joint
• Barbed Wire (as topper wire) 

Best Option

• Fixed Knot (Pro: 2096-6 or 1690-6) with 1 or 2 strands of predator 3" barbed wire
  • Topper wire: Cattleman® Pro 14g Barbed Wire 4 pt 5" or Gaucho® 15.5g Barbed Wire 4 pt 3"

Good Option

• Fixed Knot (Pro: 1775-6, or 1478-6) with 1 or 2 strands of predator 3" barbed wire
  • Topper wire: Cattleman® Pro 14g Barbed Wire 4 pt 5" or Gaucho® 15.5g Barbed Wire 4 pt 3"
• Gaucho® Pro Field Fence (1478-6)
  •  with 3 strands of: Gaucho® Pro 14g Barbed Wire 4 pt 5" or Gaucho® 15.5g Barbed Wire 4 pt 3"