scaly mites

My pet Pickles (kakariki) has had yellowish toes and strange looking scales for about a month. I suspected it was mites at first and used scaly face and feet treatment according to the instructions. However, a week has passed and it hasn't changed at all... I'm starting to worry that he might...

This is Kiwi. I got him a little over a month ago. I think he is less than 4 months or maybe 6. I assume he is young from the full black eyes and bars on his head to his cere. His behavior is ordinary : chirps and sings. flaps his wings in excitement and play/exercise and preens regularly...