So my parrot, Guinavere, has been missing most of her feathers on her legs for about the past few weeks. I was getting her out of her cage just now and noticed that feathers around her anus were missing. I've read that this can be a few things, but she's not sitting at the bottom of her cage, she's still active/playful. She likes to nibble back more than step-up most of the time, though, so I'm just hoping this is her getting ready for her first egg or something like that. She's ~4-5 years old. Any help at all would be greatly appreciated, and if it's just a "bring her to the vet" response, please have some greater detail.