I just built a quail pen and was wondering about how many birds I could comfortably and safely put in my pen. The pen is 9x5x4 and I plan to get either Texas A&M Whites or jumbo coturnix quail. Is there a square foot per bird rule of thumb or male to female ratio rule? I am totally new to raising quail so I know pretty much nothing about it except what I have read. I attached a picture of the pen I built if that helps any.