This is THE perfect idea for me and thank you for sharing. I already had 4 each chain link 6'x6'x6' dog pens that my home contractor put together and made a 24'x24'6' run for my miniature pony. He attached the dog pen to a 24'x14' covered horse stable with a metal roof but due to back problems, my relatives inherited my miniature pony. Last year, my granddaughter got old enough to talk me into a pair of Pekin ducks and then we added 3 Ameraucana chickens and we have a pair left now due to a Bald Eagle swooping down in front of us and picking one up. No more chickens until I get the run covered and the stable enclosed because they are housed in a couple of big dog houses until I could get the horse stable enclosed for a chicken coop. We get one duck egg and one chicken egg a day and they lay in a 5 compartment nest that I put together in 2003 when I had a makeshift chicken pen at my mother's home. I love what you did to the pen gates and since I already have 4 gates, my contractor put the pens together where the gates can interlock like your gates if I turn one around. Now, to get the stable ready for this Georgia weather. I do need to add some ventilation in the coop because of the direct Sun hitting the stable and I need shading for the run. Your idea is a wonderful start since I already have the framed and covered stable. Now, I need ideas on a shaded chicken run. I have my share of hawks as well.