A lot depends on the fence. You can hang some old cd’s every now and then along the top edge so they will spin with the wind. Our most effective was sending hubby out to “water” the edge of the garden. That scent will keep a variety of critters away.
Old AOL discs also made nifty targets.
I told mr. mm the same thing.
He needs to water the garden all the way around. It’s a decent size, too, but we had heard that men’s urine scent will work well.
Since we can’t even see the neighbor’s house, that should not be a problem.