We just used the fencing I had around my garden. I think it was called Deer Fence and it's only 4' tall. The chickens can stick their head through, so now we are going to get another type that will just around the bottom portion to make it more secure from predators sticking their arms in, or digging. We have Bird D-fence for the top. We have a couple of trees in our run so it acts as shelter and the bird fence is up over the open section so flying predators can't get at them. We tented it because I like to go into the run and stand up.