Well you really don't wanna feed your females, they are your main source of breeders. The less females you have the slower your colony is going to develop. You can feed adult males, but don't feed them all. You need them to mate with the females so they can have more babies. I only feed off my roaches that aren't adults yet. Sometimes I feed off some of my males if I have too many of them. But Its up to you if you wanna feed off your females. Most people wouldn't because it would take longer for your colony to produce more babies.