Weaning is a very difficult time for the young chicks. They're torn between wanting to be grown up yet they so desperately
need the attention from mom and dad. This is the time where the chicks learn what the different foods are as they slowly lose
interest in their handfeeding formula.
Back to Breeder Basics
Below are several sites I have found helpful with the weaning process.
Companion Parrot Quarterly
The Birdie Boutique
Parrot Talk - The dangers of weaning
Winged Wisdom (very very good site for parrot info!)