Be sure and feed them a gamebird feed as they require a higher protein. Gamebird starter is usually 28-30%. The gamebird feed has animal protein in it which in my opinion helps with the feather picking. Many people also put blinders on to help with this. I have been fortunate so far not to have to do this as I hate the things. The more room you can give them, especially with ringnecks, the better off you are as this also helps.
There is alot of great info here and many experienced breeders. I actually held off on getting them for a few years because of all the horror stories I heard about them, I wish I would have gotten them sooner.