My littlest button quail, Buzz, began laying eggs four days ago. So far she's been laying every evening around 5-7pm, getting a little later each day. Today, though, no egg. I checked on her around 11pm and noticed she was sitting in the sand bath, poofed up into a little feather ball with eyes, and straining. She's been picking at fresh greens and at the sand and looking around, but she seems uncomfortable. Is this pre-egg behavior or egg binding? If the latter, what can i do for her? How long until i should be genuinely concerned? She is my favorite quail and i'd be devastated to lose her.