mine is 6" and was fine for a few years
last winter bedding had built up enough that when the ground froze and heaved.. and the ice built up several inches from a month of freezing rain, snow, thaw, freezing:barnie I had to take a pick out there to get in.
I have 2 coops, divided in half... that have a door on each end, one in and one out.
one of these coops I divided in half with a door in between.
The other has ability for birds to pass through but not me. I ended up switching the swing to out
In front of each door swinging in, a bird has...