Testing of Norwegian Red outside of Norway has over time become very extensive. The trials with Norwegian Reds referred to here have mainly been initiated by universities and research institutions in the respective countries due to the increased concerns with current female fertility, calving ability and overall health of the Holstein breed. Trial results have been published in recognized international journals.
The reason for choosing Norwegian Red as a breed for these trials is that Geno has included fertility and health in their breeding program since 1971 and 1978, respectively. Also every proven Norwegian Red bull in the breeding program has a very large daughter group (minimum 200 per bull), resulting in accurate bull proofs for lowly heritable traits such as health and fertility.