Thanks for your reply. You are correct, it would be 20x4. We could go to 6’ wide for the extension so it would be 14x6 and 6x4. We were intending on elevating the coop. Do you think that would be enough?
I'm quite new to keeping chickens, we currently have 3 lohmans that are about 14 months old. We have had them for about 7 months. As I think is probably quite common we already want to expand the flock! At the moment we have a combined coop/run on the patio where the chickens spend the night and...