All but one pair of my breeders are raising their second round. Today one of the pair had laid an egg (third round) and I removed it and replaced it with a wooden egg. How old should the young be before the pair can be split and leave one of the pair to raise the young or should I leave them alone until the young are on their own? Also, if they can be split before the birds are weaned, which one would be best at raising the babys. Except for the pair that have raised only one round, I don't need any more young from these pairs.