About Us

CHROME SHEEP STUDS is run by Matthew and Tanya Tonissen and staff, located just South West of Hamilton on Dartmoor – Hamilton Road (click here to see map). The property is on basalt soils in 700mm rainfall country.

Our stud ewe base consists of: 

  • 700 Mixed Aged Poll Dorset & Southie ewes
  • 1400 Mixed Aged Chromedale, Perendale & Coopworth ewes 
  • PLUS approx 1000 mated ewe lambs across all breeds

To back our stud we have a commercial flock of around 1500 Chromedale/Perendale ewes for Prime Lamb production.


CHROME SHEEP STUDS - Performance Recorded 

Our measurements include, but are not limited to;

  • Birth weight
  • Birth type e.g.single/twin
  • Rear type
  • Weaning weight
  • Muscle depth
  • Fat cover
  • Adult weight to limit adult ewe frame score
  • Temperament
  • Lambing ease
  • Gestation length - short GL is generally associated with lighter birth weight and improved lambing ease
  • WEC
  • Dag Score
  • Extensive AI & ET programs to maximize our genetic progress
  • Full Pedigrees on all Stud animals
  • Fully Lambplan recorded
  • Annual visual assessment of all Stud ewes


 Embryo Transfer in Action


Our Awards

  • Awarded the 2006 RASV Sheep Producer of the Year
  • 2006 RASV Young Farmer of the Year

See media releases


Latest News

Pre Sale Inspection Day

 Monday 7th October 2019

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11th Annual Ram Sale

On Property at "CHROME" on Thursday 10th October 2019

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Chrome Genetics Ewe Sale on AuctionsPlus

December 2019

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2019 Sale Reports

8th Summer Ram Sale (18th Jan)

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2018 Sale Reports

 Results of the 10th Annual Ram Sale (11th Oct), 7th Summer Ram Sale (19th Jan) & Chrome Genetics Ewe Sale (4th Dec)

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