Wiring it self is difficult to setup for repelling foxes. I ignore is value for such. Fencing can be set back from stream and heavy vegetation. My electrified areas are setup so structures do not interfere with desired straight lines in perimeter. Additionally, I grew up around electric fencing getting zapped many times. No lasting damage despite not learning how step over high enough or crawl low enough under every time, especially during winter and after dark. My current setup also challenged with yard ape management (eldest 19 months). He and an his younger sister will get zapped eventually and more than once to be sure but I also turn off fence while I am out to limit such lessons. Its when neighbor kids come over you got to watch out. Then kids get stupid playing with fencing like they sometimes do with fire or licking very cold flag post during winter.