HI! I have 4 hens and 2 roos (already gave away 2 roos last year.My kids and I can't part with these). I have an 8x8 coop, 4 nest boxes, and ample free range. How many pullets can I add? Should I just double the hens (4)? There is a defined pecking order, a bit complicated with the beta, but it works. The hens are losing back feathers from my boys.