goldenyears
Songster
My bad - I was not considering roosting/coop space. Thanks for the clarification!When looking at roosting space they will choose the highest place possible. While roaming they are on the ground looking for goodies to eat.
In the OP's case they are looking at needing additional roosting space therefore that space under the coop doesn't count.
While birds will use the space under the coop it counts toward run space not coop space.