Cows were consistent in some of their production traits. However, none of the behaviours found to be consistent over time were correlated to any production traits. Neither was personality correlated to variation in milk production increase across the three first lactations of an individual, i.e. milk production estimated as a life-history trait. 

In addition, cows’ current production status, thus the production value (kg, ECM) the actual month when tests were carried out, seems not to affect cow behaviour.