I want to build a run that parallels my backyard fence. The fence is about 5.5 feet high and wood with no gaps. I want to take out some of my landscaping along the outer edge and run wire, allowing for about a 3.5ft wide run. My concern is the wire height. The only wire I can find is 4 feet tall. I want to dig in at least 4 inches, allowing for only about 3.5 feet tall. I have to assume that the chickens can jump right over. I really do not want a roof. Any suggestions? Thank you.