I use deep litter mulching in my run in a sub~tropical climate [think HIGH humidity] & get very little odour. If I do I simply add more leaf litter or straw. Also I'm not sure what predators you get in your part of the world but without a wire bottom or a collar things can dig in under & get your chickens so you may need to rethink that one.Thank you so much for your thoughtful reply. I love the speckled Sussex! My dog is speckled so I'm quite partial to the pattern.
I think the wing clipping idea is fantastic and the added peace of mind I need.
I can definitely connect the two runs. My thought process was that with two smaller runs made of lighter weight material would be moveable. That way once the birds had produced a fair bit of compost I could switch them to another run, move the old run and easily access all of the compost. Though you are right that two runs aren't necessary. I wanted to have moveable preferably bottomless coops for the same reason. With the heat and humidity it doesn't take long for it to start wreaking be of ammonia