Rainbow lorikeet

by Eddie
(Indiana)

I have a 9 month old austrialian rainbow lorikeet and lately it's been acting like its has mites I've had it on a mite treatment for weeks now but nothing seems to be working is that natural behavior for them? Also the lorikeet will start rolling in its cage and jumping up and down out of no where

This is my first pet that's a parrot so jdo t kno much about their behavior other then it loves to eat bananas and berrys also sometimes it likes to eat prickly pear along with its regular fruit
I have a questions over what types of fruit they can eat