We have aprox 21 sq foot coop with a 12ft x 12ft run. We currently have 5 birds, 1 dom and 4 RSL. We had 6 but lost one a month ago. We would like to add a few more next fall. Do we have room for more? We can't easily make the coop larger but we could make the run larger? My plan is to add 2 easter eggers and some type of wyandotte.