I have a large tortoise shed that is divided in half for my 2 male Sulcata. When it's time for them to go outside, I open a doggie door for Big Sam, but I have to carry Knobby over 2 cinder block walls to put him in his pen...it's never been a problem...however, he is a GROWING Sulcata and now has gotten so heavy I can barely hold him...so a friend is going to cut a doggie door on Knobby's side of the shed and he will have a pen that's goes all along the width of my yard...but it's full of blackberries and other stuff...I've been working on the berries but they are so tuff that the first part I cut down is growing back while I am still cutting the rest...anyhow...I am going to show how you can make a tortoise pen without any supplies, talent or strength...here's a picture of the shed with the pens visible...Knobby's new pen will be on the other side of that small cedar fence...