This isn't uncommon from these hybridized production model chickens. It also means they only lay for a couple years and often die young from impaction or bleeding or they break bones because they produce unnatural amounts of large eggs and deplete calcium from their bones. Not your fault of course, just the way it is with them. They can only absorb so much calcium regardless of how much they eat.
I prefer to keep my line of Rhode Island Reds that lay for 4-5 years and are able to stay healthy without needing calcium supplements.
I prefer to keep my line of Rhode Island Reds that lay for 4-5 years and are able to stay healthy without needing calcium supplements.