I know from reading that 3 eight ft ground rods properly spaced are recommended for grounding the fence. My problem is that I don't think we have over 2-3 feet of dirt where I need to put this fence up. The whole place sits on top of sandstone with a cliff along one side. So can the ground rods be driven in at an angle to get the entire rod in the ground? Or should I cut up my 8' rods into 12 two foot rods? Or am I going to have to drill? Anyone else had to deal with this?