yes, indeed in my neighborhood their runways run through 4 feet fences.
It only takes a few strands of electric wire, and I have seen one in
the past touch the wire and the whole group (seven) dart away and never
come close again. but even in the other garden I have that is too far
for electricity, leaving pieces of chicken wire and chainlink laying
around the perimeter proved more than they could stomach. They just
don't want to step in and risk breaking a leg. Yes, it is a pain to
remove every time I have to mow.