I have 1 coop that is 12'x 8'. There is an attached run that is 20'x 40'. I am wanting to build, somewhere in my spare time, a coop approx 16 x 16 that will house different breeds in one large coop so I can get some purebreds. I am wanting to build something similar to a barn that houses horses with the pens down both sides and an isle in the middle. Each pen would have its own access to its own run. I will only have about 5-7 birds of each breed so what I have in mind are 4 - 4x8 pens down one side and on the other side 2- 4x4 pens for isolation/sick or just to seperate and one 4x8 brooder. Does anyone have plans or pics of anything like this I can broaden my ideas with? My existing coop and run will continue to house a mixed flock.