Hi all, I have three 6 month old handfed cockatiels. They are tame and they do not bite. But the problem is, they won't sit in one place. They will fly, and will sit on random objects like ceiling lights, shelves, etc and won't come back, pooping there are chewing on items. This forces my mother to lock them in the cage most of the day, which I cannot bear to see. How do I train them to play around without flying? And how to potty train them?!