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 flocks consist of:
- 400 Poll Dorset ewes plus ewe lambs
- 400 Coopworth ewes plus ewe lambs
- 640 Maternal Composite ewes plus ewe lambs
- 120 Perendale ewes plus ewe lambs
To back our stud we have a commercial flock of around 2000 Maternal Composite and Coopworth 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