I am still a beginner at this, but what I do seems to work for me..

I think many people will just leave one of the females in after the others have been weaned. It will be a while before she will breed.

If you can remember their birth date, I would go 21 days +/-. Like I said, I just watch them every once in a while around that time to see if they are eating on their own. They will be eating on the same Mazuri 6F as the adults. I don't have it in the hopper above the tub. I keep it in a closeable wire mesh cube inside the tub. This is done inside the grow up cage as well. That way they don't just take it and bury it somewhere, and they dont just chew it to powder. I also make sure that the drink tube can be reached by the babies.

Hope this helps.