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: 

  • 400 Mixed Aged Poll Dorset ewes
  • 400 Mixed Aged Coopworth ewes 
  • 640 Mixed Aged Chromedale ewes
  • 120 Mixed Aged Perendale ewes
  • PLUS approx 800 mated ewe lambs

To back our stud we have a commercial flock of around 2000 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
  • 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

Hamilton Sheepvention 6th & 7th August 2018

Chrome Sheep Studs will be having a display at Sheepvention situated in the Sheep Tech Marquee.

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Henty Field Days 18th-20th Sept 2018

 Chrome is heading to the Henty Machinery Field Days. Site 1049A Block V

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2018 Sale Reports

 Results of the 7th Summer Ram Sale (19th Jan)

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2017 Sale Results

Results of the 6th Summer Ram Sale (20th Jan 2017) and the 9th Annual Ram Sale (12th Oct 2017), Chrome Genetics Ewe Sale (19th Dec 2017)

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2016 Sale Results

Results of the 8th Annual Ram Sale (6th Oct 2016) and the Summer Ram Sale (22nd Jan 2016)

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