My cockatiel sometimes makes a really weird noise and I'm not sure why. It's very raspy and breathy. She does it when she wants me to pet her. She acts completely normal, eats well, sociable, and her dropping look fine. But recently she has started to lay in the corner of her cage. At first I just assumed that she was trying to lay eggs because she is grumpy while she does it, but now I'm worried. I'm going to take her to the vet, but what should I expect?