Ok,so sometimes sophie our tiel will be streatching or preening and start sreaming,holding her wing, and shell scream for a while,as she attacks toys in her cage, she doesnt do this often,but when she does,its loud,and concerns us, she just went through one of these things,and i cant figure out why she does this. anyone have any idea what this could be? its not a broken wing, because she still flaps them fine, a few weeks ago, i did notice what looked to be a blood feather on the bottom of her cage when i was cleaning, so i dont know whats going on,any help is appriciated!