My Roadisland Red seems to be having issues passing a egg. She's been in the nest box for almost two days. I put a water and food tray today for her in front of the nest box. She's eating fine drinking fine. I see her straining a lot she's one of my best egg laters some times double yokes. I can feel the egg is ready but for the past two days nothing. I seporated her from the others in a dog crate and moved her with her nest crate in it. Is there any thing I can do to help her? I know it's not calcium as I give sups in water and oyster shells always on near.