We plan to fence in a large area for our chickens. I am going to guess it will be about 1/2 to 3/4 of an acre or so. They are currently free ranging in the yard and tall grass. They are locked up safely at night. Since they are locked up every night, do we still have to dig down and bury the fencing as well? The main reason we are going to fence in is to control what they have access to and restrict access to others in "their area".