OK I need some suggestions. I asked the person building my new fence to make a couple of hedgehog highways in the base, but he forgot, and I could not see this till somebody sighted came around. He says now its too late as the concrete Gravel boards are now cemented in, even though the fence panels can of course be pulled out. So Should I try to dig little tunnels under the concrete about 6 inches deep and line them with something to create them? I don't really want to try to cut the concrete gravel boards, and then rejoin them with brackets or something as for a start it will not last and secondly a lump of angle iron on the bottom of the fence will look awful, and rust way.
Anyone done this after a fence with a cement gravel board is built? Brian