I've read that 1:3 is a good ratio for quail, and as high as 1:5. If you're going to have a lot of birds, say 5 males to 15 females, you need a much larger space and lots of hidey holes for them to call their own. Of course, mine are still too small for that... I'm just going by the reading I've done in preparation for that day. I have one pen that has 5 males and 7 females - they'll have to be sorted out. But another pen has 1 male and two females, and life is calm in there.
