Good luck! It's a lot of work. The pen I'm building now is actually for my ducks, and I'm having to do it quickly because I've got 22 3-week old chicks on my back porch that are gonna be too big to be on the back porch in about a week. They will all live in a big shed I bought, but I'm doing a hardware cloth wall in the middle and then a big run on each side where they can come and go as they please. My original plan was one run for all animals, but I have too many drakes, and I'm afraid they'll bug my chicken hens. They will hopefully get to free-range together when I can supervise them due to the fox issue. . I'll probably eventually add to the duck run to make it bigger (when it's cooler outside and life is a little slower), but right now my goal is just security so I can get them outside ASAP. The run is about 20 x 16 feet, give or take. They're living in the building now with limited outside time (only when supervised), and I know they want to be out as much as possible. I would have had all of this finished sooner, but my mom got really sick, so that's kind of put me in a jam with all of it. Thankfully, I ordered a ton of hardware cloth a few months ago, so I just need to go pick up some lumber tomorrow to attach it to the fence posts and get my apron finished, and I should be finished..for now.