In order to maintain year round egg production both light and nutrition must be properly managed. It is important that the number of hours of light do not decrease; this will put the hens out of egg production. The hens need to be feed a well balanced diet with sufficient calcium to provide a strong shell that will not break.

Principles of feeding small flocks of chickens at home (Utah State University)

Nutrition for the backyard flock (West Virginia State University)

How to feed your laying and breeding hens (Pacific North West extension)