I'll add my nod. Electric fencing has proved the most effective means in my experience of keeping out unwanted garden eating animals, of any sort. The painful experience of the testing of the fence sticks in the animals memory for some time. Put a wire right at nose level for whatever animal you are attempting to dissuade.
In my past with deer in South Carolina (which ransacked my neighbors sweet potato vines), I employed "3-D" electric fencing. The gist of that one was you used electric "tape," which is much more visible, at about 5ft high, then run another line that'd 3ft further away, 3ft off the ground. Deer suck at depth perception apparently. Makes them reticent to jump when they detect depth to the barrier. They can jump straight up and over a 8ft normal fence though! So they come along, meet the first 3ft barrier, give it a sniff and ZAP. First and last time that deer gives it a try. After awhile I removed the charge from the 5ft line, didn't need it, they always went for the sniff test on the 3ft line.
My point here is trying to make a barrier at which the animal is incapable of wiggling through, like 5/6 lines of aluminum wire spaced at 6", is more trouble than it's worth. You will get into issues of vegetation touching the lower wires, which greatly reduces the amount of voltage left to shock the animal. Since you are only battling one type of animal here, and one that doesn't jump worth a damn, try just one line of electric tape at like 2ft off the ground. Don't pull it taunt either, it's more intimidating if it flaps in the wind a little bit.
For extra fun set up a camera trap and watch the hijinks ensue.
EDIT: Just read the link from kalakoa and that guy mirrors my sentiments pretty well.
In my past with deer in South Carolina (which ransacked my neighbors sweet potato vines), I employed "3-D" electric fencing. The gist of that one was you used electric "tape," which is much more visible, at about 5ft high, then run another line that'd 3ft further away, 3ft off the ground. Deer suck at depth perception apparently. Makes them reticent to jump when they detect depth to the barrier. They can jump straight up and over a 8ft normal fence though! So they come along, meet the first 3ft barrier, give it a sniff and ZAP. First and last time that deer gives it a try. After awhile I removed the charge from the 5ft line, didn't need it, they always went for the sniff test on the 3ft line.
My point here is trying to make a barrier at which the animal is incapable of wiggling through, like 5/6 lines of aluminum wire spaced at 6", is more trouble than it's worth. You will get into issues of vegetation touching the lower wires, which greatly reduces the amount of voltage left to shock the animal. Since you are only battling one type of animal here, and one that doesn't jump worth a damn, try just one line of electric tape at like 2ft off the ground. Don't pull it taunt either, it's more intimidating if it flaps in the wind a little bit.
For extra fun set up a camera trap and watch the hijinks ensue.
EDIT: Just read the link from kalakoa and that guy mirrors my sentiments pretty well.