Effects of keel bone deviation on post-peak egg production in a commercial laying hen flock with different breast condition

This study was made to investigate the effects of breast condition and keel bone deviations on post-peak egg production a commercial laying hen housed in multi-tier conventional battery cage. The birds divided into two groups according presence deviation at first. Then further as well developed or relatively developed. hens were kept under identical management conditions for during study. Data about daily production, feed intake, mortality weight collected from 62 77 weeks age groups. There no significant body layer hens. initial final are significantly different between (P