Which demographic of Leghorn hens is statistically more likely to exhibit unusual patterns like double-laying?

Answer

Younger hens fresh into their first laying year.

Age is a significant determinant of laying variability and peak potential in poultry. Younger hens, especially those who have recently entered their initial laying cycle, often display the most active and sometimes erratic reproductive patterns. Their systems are operating at peak vigor, making them statistically more prone to exhibiting unusual output events such as laying two eggs in one day. Conversely, older hens typically experience a natural tapering off of production, meaning their cycles become more regulated and less likely to include such biologically taxing anomalies.

Which demographic of Leghorn hens is statistically more likely to exhibit unusual patterns like double-laying?
animalProductionChickeneggLeghorn