Im working on the blueprint for my coop/run and want to know what size is a good height for the run? Right now I have 3-7 week old White Leghorns, and (3)-day old Speckled Sussex and (2)-day old Light Brahmas. I know the Brahmas are suppose to be big birds so what size is good? Right now I have a 10X10 PVC pipe temp coop that Im using 2ft high hardware cloth and would like to re-use that for the permant coop/run if possible. So for else chicken is a 2ft high run okay? Oh, and they will also be able to free-range some during the day. If it isnt what size to you suggest?