Every chicken will have a different egg production even within the same breed. Some variables that affect this can include, but are not limited to history of sickness, worms, care, lighting, climate, geographic location, housing condition, crowding, feed consumption, water conditions and consumption, nutritional care, bedding, sunlight availability, number of cockerels with the flock, noise condition, nesting conditions, roosting conditions, winter housing conditions, summer housing conditions, predator harassment, whether or not you are breaking up setting hens and more.