I am planning on putting up an electric fence, but have no clue what I'm doing.It is hard to explain the layout I have in mind. My house is at the side of the property. I have land one three sides. I want to fence off the back and side yard. The portion that would run along the back of the house is the part I am wondering about. Do I need to put up posts, or can I attach the wire to the side of the house?