I fenced in a 5 acre food plot with one strand of electric fencing this past season due to the unexpected buying of some additional cows . We normally don't run cows in that pasture during deer season, but with prices being so high, we bought more in October.
At first I used the little rebar poles that come with the fencing, but the cows started jumping over it and catching the wire with their back legs and flipping the resistors and wire off the poles.
Changed all the poles out to T-Posts and T-Post resistors, and that solved the problem.
Deer never had an issue with it once they learned it was hot. They went under and over, whatever it took to get into the groceries.