The exact definition of longevity varies among studies, with productive life often discussed as the time a cow remains in the herd from first calving until culling or death (Brickell and Wathes, 2011;...
The RTS system (Anderson et al, 1991) ranges from score 1–5, indicating prepubescent to pubescent reproductive tracts, respectively. The reproductive tracts are palpated per rectum, and a score...