Moos van de Graashook was sired by Mogli out of a Lucas dam with the same maternal line as Bobo, Beer and Brutus. This cow family has produced Bobo, a beef on dairy bull with the best calving ease scores.
K.I. Samen has also tested Brutus, who shares the same Lucas dam as Moos. All the sons produced by this maternal line score higher than expected for calving ease and have very good scores for the short gestation time.
Just like his proven relatives, Moos is expected to produce very lightweight calves, born after what will probably be an even shorter gestation time. This means that Moos also merits 5 stars for calving ease and will probably also pass on a shorter gestation time.