What people foods can Charlie eat?
Pretty much any fruits and vegetables preferably uncooked. Corn, broccoli, apples, celery leafs are my cockatiels favorites.
Do you allow your birds to eat a little people food?
I don't give them salt, sugar (other than whats naturally in fruit), also no grease, dairy, or meat.
Is it common for her to consume a whole stalk of millet with a few hours? She LOVES millet, and almost doesn't stop eating it until its gone!
Actually that's good for her, millet is low in fat, and it's espacially good because it keeps her occupied.
She seems to be losing tail feathers easily. Is that common in young birds? Will they grow back?
Yes they will grow back. It might be her cage causing her tail feathers to break. If her cage bars are vertical they could be breaking the feathers, horizontal bars would be better. That would only be the case if her cage was on the small side.