Just did my 3rd inspection at exactly 21 days after hiving 2 packages italians an carniolans. One had brood that had emerged yesterday (20 days) and the other one had brood that was emerging during the inspection. According to dummies book it takes 20 days for brood to emerge. I marshmellow plugged both queens. I used new plastic foundation. So ether the life cycle is shorter then expected or the queens were laying on bare foundation. Either way I'm happy. Just curious.