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Ranking of Active Sires

The Ranking of Active Sires (RAS) is a list of top ranking dairy sires. Individual breeding companies nominate their highest quality sires, and the bulls are then ranked according to their Breeding Worth.

Scroll to the bottom of this page to read the minimum requirements that a bull must meet to be included on this list.

The quality of the bull team that you use each year is the single biggest driver of genetic improvement in your herd.

  • Always target high BW bulls
  • Check the breeding values of the bulls in your team.

If you are interested in improving certain traits, such as fertility, then it is worth double checking your team to ensure the bulls suit your individual requirements.

No two farms are the same - use our bull team builder tool to build a bull team which is tailor made to suit your needs.

The latest Animal Evaluation run took place on 18 February 2017 (the next run is on 18 March 2017). Click here to view the full AE run schedule.


The Ranking of Active Sires (RAS) list is a ranking by Breeding Worth (BW) of sires nominated by artificial breeding companies. An active sire is one which is likely to have at least 500 doses of semen available in the following mating season. New Zealand Animal Evaluation Limited (NZAEL) establishes the criteria for eligibility for this list. These criteria include:

  • Minimum reliability of 75% for BW from progeny and parentage information sources
  • At least 10 herds with two-year-old herd tested daughters included in the bull's proof.

Click here to download the RAS list


Artifical breeding organisations have agreed that the following information on genetic defects should be published, and have supplied details for their animals. While every effort has been made to ensure the accuracy of information in this section, no responsibility can be accepted by the Animal Evaluation Unit for any inaccuracies or omissions in the information. The following tests are reported on the website:

B = Bovine Leucocyte Adhesion Deficiency (BLAD)
V = Complex Vertebral Malformation
S = Small Calf Syndrome
C = Citrullinaemia

If a bull has been tested for any of the genes, the appropriate letter will be entered. Absence of a letter B, C, V, or S means no test result for Bovine Leucocyte Adhesion Deficiency, Complex Vertebral Malformation, Small Calf Syndrome and Citrullinaemia has been recorded by the AE Unit. Results of the test are illustrated by (+) for tested positive (ie the bull carries the gene for that condition) and (-) for tested negative.