Hi. My 2 baby cockatiels have grown up so fast. They are about 4 weeks old. They have begun to flap their wings and pick at their nest. But I'm not sure when/how fledging or weaning begins for them. They are parent fed. One of the babies have begun to step out of the nest and start to stand on the perches. Because they are parent fed, should I let the parents teach the babies how to eat solid food? Should I let the parents teach the babies how to fly? What should I do during these stages of my baby cockatiels life?