Have you checked her over well, for lice and parasites? She looks pretty healthy. Is she sitting in the nest a lot or disappearing for lengths of time? Are the feathers missing from her belly? If so, she may be broody and hiding the eggs.Thank you! were is that section located ? Since the post she layed one egg but again that was 10 days ago & no she still is playing eating drinking .. I am starting to notice her feathers lying around and more than normal but no patches on her Is she old enough for her 1st molt or even a light molt heard it was 18 months she is about 11 months ?
Here is the link for posting in the Emergency forum:
https://www.backyardchickens.com/forums/emergencies-diseases-injuries-and-cures.10/
Good luck & do keep us informed!