This morning it occurs to me that a Marga Meyer Memorial Dreieck in our back yard may have decisive advantages for the social, psychological and economic welfare of the family, and that Laura, you and I should seriously consider installing a fence in our back yard, and that YOU should make the final decision. Such a fence could be DIY or professionally installed, it could be wooden, metal, mechanical, electric or wireless. Google has numerous leads. When I googled "electric fences for dogs" I received an avalanche of information.