Anyway, they are fully feathered, about 7 months old (one green, one yellow) and they are living in an aviary outside my son's bedroom. Anyway, because I hand raised them, they are used to me but I didn't sook them too much because I knew they were going back into an aviary and my house pet bird Chookie didn't like the competition

I have tried to ignore the bites (as I've read from other peoples advices) but I am sick of the injuries!! Also, when I put the food in their cage, if Sunny goes to eat first, she gets attacked (not serious, just a bit of a beak battle until she backs off).
I never had this trouble with Chookie, but then Chook was raised alone. He had the odd nibble but never anything bad or that drew blood.
I always know when Chuckles is about to bite because when he lands on my shoulder, he starts to make 'chuckling' noises (hence his name), then attacks. My husband calls him 'Devils Spawn'

I guess I'm putting the question out there - Is this just a normal thing or is he too bossy and I should separate the birds?? It seems that the birds I hand raise all end up with strong personalities (mostly good, Chuckles being the only evil one!!), whereas the birds raised by their parents are a lot calmer but won't come near you.
By the way, they have lots of toys and a happy hut which Chuckles is the boss of and won't let Sunny use.
Thanks for any suggestions or advice!
Jade