I have an 8x8 building and would like to know how many large breed hens could fit comfortably into it. I have the building now, and I have the chicks in their brooder... but I am falling into chicken math... I would like 15 hens but currently have 12. I just thought I would ask before I go get these other birds (3 welsomers) that I ALSO really want! And then, how many nesting boxes should I install? We haven't gotten to putting in the nesting boxes yet and just thought I would ask. I was thinking 6. Thoughts? Thank you!!