My coop is a 6'x8', with a flat slope roof that goes in height from 8' to 6'. I have been thinking of putting a 2nd floor in it. The 2nd floor would work out to about 6'x4', with a ramp/ladder to the ground floor. The idea is to have more room for the girls. With the possibility of using the 2nd floor as a brooder or quarantine area if needed. Has anyone done this or see a problem with doing it?