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X2 on Two Crows. Many things can influence laying. Light hours, stress levels, nutrition, dirtiness, molting, bullying, etc. Chickens need about 16 hours of light a day to lay eggs. Stress, dirtiness and molting all causes them to stop laying. Make sure to give them lots of protein during the molt. Mealworms, peas, quinoa, meat scraps, etc. Chickens also need proper nutrition in their diet. Layer feed and calcium along with greens and water is what laying hens need. Make sure to watch for bullying behaviors too. Isolate the bully for a bit.
She could also be hiding her eggs.
Good luck!