I live on a corner and my front garden is about 6 ft above the pavement, it's an ideal territory marking spot, they also repeated dig up and bury things in the borders. I'm likely to pick up an electric fence this year, nothing too strong but enough to deter foxes and cats. I've tried netting which stops the cats, but with the foxes, there are particular spots that it likes to dig, and it either rips at the netting damaging everything around it, or digs next to the netting. I've seriously considered making a trap, catching it then driving it 50 miles away. Currently it's looking like an electric fence is going to be the one. They are very reasonable for what I want, about 80 quid, and 80 quid for peace of mind, well that's a bargain in my book.