A bare spot is a terrible thing to have in a garden. The local strays have put it there and don't get the hint when I run them off. When I pruned my lemon tree it gave me a great resource to take care of the problem. Someone tole me once that you should put a lattice of sticks across bare spots like this to deter the cats. I figured a few thorns would be an added bonus.
My lemon tree has thorns that are over two inches long. Some of them I pushed into the ground to keep the trimmings in place and some are sticking up to make a very uncomfortable bed. So far they have stopped sleeping there.