Even though I've only had ex-bats for a short while, I'm thinking of upgrading their coop to cope with future expansion. Right now, I have a fully-kitted out shed (made from pallets) that is 4m wide x 3m deep and 2.5m high and there's 10 ex-bats. There's also a very big run, prob 3 times the shed - and that's also set to expand. Then I thought, why don't I have a multi-tier shed? Pretty much, to have a void in the centre to allow access and light all round and then a "mezzanine" floor at least 1.5m in depth all round with steps for the girls to go up and down. Other than the nightmare of cleaning, would a mutli-tier shed work? (Access to the outside run would be via one of two pop-holes.) Thanks for reading me and your time to reply.