Im a fairly new bird owner and I have a cockatiel about 6mth old. Recently (1wk ago), I went out and came back in the evening, there were a few specks of blood at the bottom of her cage, it had come from her wing. It was clotted so I thought it was alright (vets near my area are really expensive). But recently, her chirps when she is really happy in the evenings, sound muted and not that loud, she is still trying to. But her screams when I go out of the room and others sound alright, please help I'm worried, I'll bring her to the vet if it's really dire. She eats well, preens and plays well.