Ideally, multiple traits would be considered for selection, such as milk yield, AFC and longevity, to consider both production and functionality. Such a plan might be difficult to implement quickly, so, for more simplicity, evaluation could initially be based on ‘likeability’ scores assigned by the farmer. To evaluate likeability, farmers would be asked to assign an animal a score of from 1 to 5, where 1 and 5 indicate an extremely poor or good cow, respectively. Such a trait would comprise a mixture of productivity, reproduction and health. Studies have shown that such a trait has a heritability near.
