Separation is not a big issue initially. Everybody can start out for the first 8 weeks on a gamebird starter, then switch to a gamebird grower. You should be able to separate at this time, but really not yet necessary. These guys just do better on the higher protein. They will do ok on regular chick feed, but won't maximize their growth. By 16 weeks when you need to start feeding laying pellets to the pullets, you should have been able to separate the cockerels out, even a beginnier, lol. Medicated feed isn't required, but you should watch for any signs of coccidia closely and can medicate water if necessary. Most medicated chick feeds have amprollium, not an antibiotic. Medicated gamebird starters have bacitracin, and won't do much for coccidia anyway. Lol, laura, I see you beat me to it, but I'm going to post this anyway, since I already wrote it!