Data from the measurement of bone density of laying hens using post mortem density and quasi static material testing and live bird x-ray derived density estimates. This is for the validation of live bird x-ray as a potential tool for genetic selection. A reproducability/repeatability study and a manipulation of skeletal quality experiment are included and a SOP for the performance of the technique to allow replication and to give more data than in the paper this accompanies.CBPS_P172_DensityBS.csv Body weight, Post mortem tibia breaking strength, stiffness and density, live bird tibia density estimate, a key is included CBPS_P172_DensityBS.xslx Body weight, Post mortem tibia breaking strength, stiffness and density, live bird tibia density estimate, a key is included CBPS_P172_RepeatabilityReproducability.csv Body weight, Post mortem tibia breaking strength, stiffness and density, live bird tibia density estimate made on successive days and measured by two operators CBPS_P172_RepeatabilityReproducability.xslx RepeatabilityReproducability.csv Body weight, Post mortem tibia breaking strength, stiffness and density, live bird tibia density estimate made on successive days and measured by two operators CBPS_P180_Tibia.csv Body weight, Post mortem tibia breaking strength, stiffness and density, live bird tibia density estimate for hens fed with diets differing in calcium and phosphorous content, a key is included CBPS_P180_Tibia.xslx Body weight, Post mortem tibia breaking strength, stiffness and density, live bird tibia density estimate for hens fed with diets differing in calcium and phosphorous content, a key is included SOP-X-Ray.docx Detailed methodology to carry out live bird x-ray.