Jon wrote:
(snip)

To everyone that suggested an
electric fence those are expressively forbidden in my area as are barb
wire and chicken wire.

You are not going to tear out your existing fence and install an
electric fence, making your yard look like a cow pasture. That is likely
the intent of the ordinance. You already have a fence and I doubt anyone
is going to notice (much less complain) if you string some wire on it.