At Jersey NZ, we believe every farmer deserves the best cows; we believe that cow is Jersey.

About Jersey NZ

Jersey NZ is a non-profit member organisation dedicated to making Jersey New Zealand’s number one breed. We work collaboratively to provide education, advice, and advocacy for all our members. Talk to us today to discover the benefits of the humble brown Jersey cow.


To see Jersey become New Zealand’s number one breed with the largest percentage of the national herd.


To promote and drive the growth of the jersey breed throughout New Zealand.


  • We collaborate with others
  • We work with integrity
  • We endeavour to operate sustainably
  • We believe in quality

The Jersey Secret

The jersey cow out performs all breeds and cross-breeds on a per hectare basis.

  • Jersey produce 13% more milk solids than other breeds (Jerseys 726KG per HA, Other 641KG per HA)
  • Jersey produce 2% more protein than other breeds (Jerseys 497KG per HA, Other 489KG per HA)
  • Jerseys convert 18% more feed per kG liveweight

Liveweight comparison

The Jersey cow out performs all breeds and cross-breeds on a per kilo liveweight basis.

On a per-kilo LWT basis, the Jersey outperforms all other breeds and Cross-Breeds in kgs milk fat, protein and milk solids. To double check this we assessed the AE information in relation to both the Genetic Base cow model and the Economic Base cow information.

The Jersey outperforms all others in terms of a higher Kg Milk Solids/kg LWT. It is also common to see around the country that the Jersey cow will consistently produce more Milk Solids than her live weight…a machine at her best!

Jerseys have great fertility

On average, Jerseys have the highest fertility breeding value. Fertility breeding values (% calving within 42 days of the start of calving) are calculated from information derived from herd recording software such as MINDA and MISTRO, herd testing and Traits Other Than Production (TOP) assessments. Eight individual predictor traits are currently used to estimate the fertility breeding value:

  • Presented for mating within 21 days of the planned start of mating (PM21) in lactation 1, 2 and 3
  • Calving rate in the first 42 days after the planned start of calving (CR42) in lactation 1, 2 and 3
  • Volume in a cows’ first lactation
  • Body condition score (BCS) in a cows’ first lactation at 60 days in milk.

Jerseys are the breed for OAD systems

Only the best Holstein Friesians can match an average Jersey for output on an OAD system. The Jersey’s ability to carry 24 hours milk production (with high milksolids) is a key attribute.
NZ Jerseys can carry 30+ hours of milk production at one time, while an American Holstein udder is likely to be full of liquid in less than 20 hours, and a Friesian’s udder in 22 hours.

A Jersey on an OAD system will produce better milk solids, a higher protein percentage, a higher milk fat percentage, more days in milk and a better condition score than on a TAD system – making you more money.

Ahead of a long, dry summer in particular, OAD is an option to help manage cow demand for feed. The Jersey cow will help your farming business stay as profitable as possible in
the event of such conditions.