I keep 1 male to 3-4 females. I started a few months ago with about 50 males and 175 females, and now have more than enough nymphs to feed 4 chameleons and sustain/grow the colony. I have 2 bins, with one bin reserved just for breeding dubias.
Okay I have another question then... When I started the colony (still under 100) I fed cat food blended with crude proteins like oatmeal because I didn't know any better... Now my males are MASSIVE...literally twice the size of the males I received from an online source... Some of my females are very wide and flat... Also twice as big as the ones I received and I have one nymph that still shows no adult wings that is bigger than any roach in the bin... Does this sound like a growth hormone problem? How big are the roaches supposed to get?
EDIT: I am NOT still feeding cat food flukers, blended with dry oatmeal for protein and oranges for hydration... I will gut load better as I get closer to feeding any off... Colony is like I said... WAY away from being fed off
I'm not sure what's going on with your roaches, but my adult breeding females are about 2.5-3 inches long, and very plump with oothecae. The males are just as long, but much slimmer and "scurrier". They do well on fresh produce and a little human baby cereal, like gerbers rice puff.