When I let my two corgis out to do their business, my female sniffs around and finds a good spot to go, just like most dogs. Before she is even finished, my male tries to mark where she has gone and pees all over her back end. This has been happening every day. Is there a way to deter him from doing this? The only thing I can think of is to let the female out by herself first, and then let out the male once she has a chance to go. Any other ideas?