Jasper's whining for feedings!

[ChrisWink]

He started doing this about a week ago he was almost to the point of being fully weaned then all the sudden he started this whining for a feeding. He will do this several times a day and once he has been hand fed he will be fine. He is 24 weeks old and past the usual weaning point. I have a vet appointment on Wednesday morning to check if he has anything wrong. His weight is good but I'm worried something is wrong, he's the 4th parrot I've hand fed and never had them revert back to needing more feedings. Any insite form you guys would be so appreciated. Here is a short video of what he is doing.

http://vid614.photobucket.com/albums/tt222/ChrisWink5003/IMG_1593_zpsjlaazgpw.mp4