Could be a well tight culling policy, ...Loved the guy who while talking about their cow culling policy said if HE drove over a calf in the paddock then that cow was gone. Puts my three strikes and yer out for lameness into perspective.
or it could just be that the calf was lying down with a belly full of milk in the long grass the cow was busy grazing .... and he drives way too fast and is always on the phone ....