James Breen

Veterinary Consultant


James Breen BVSc PhD DCHP MRCVS, RCVS Recognized Specialist in Cattle Health and Production

James qualified from the Bristol Veterinary School in 1998 and worked in mixed and farm practice at Glastonbury and in North Somerset. After returning to Bristol, he completed a residency in farm animal medicine before working on the AHDB Mastitis Control Plan research under the tutelage of Prof Andrew Bradley and Prof Martin Green. During this time, James joined Quality Milk Management Services Ltd, a consultancy laboratory specializing in all aspects of dairy herd milk quality and mastitis diagnostics.

James subsequently completed a PhD in risk factors for bovine mastitis in 2007, was awarded the Royal College of Veterinary Surgeon’s Diploma in Cattle Health and Production in 2008 and was recognized as a specialist by the royal college in 2009. He returned to frontline dairy practice in Glastonbury on a part-time basis, continued to enjoy a part-time role at QMMS and joined the new veterinary school at Nottingham University, teaching final year veterinary undergraduates as well as continuing to be active as part of the dairy herd health research group. James left QMMS in 2019 to join the veterinary team at  Map of Ag and now divides his time between veterinary consultancy work with Map of Ag and teaching and research at Nottingham.

James’ role at Map of Ag involves providing technical advice relating to dairy herd health, welfare and management to the dairy industry from producers to processors, consultants and retailers. James continues to teach veterinary surgeons both at undergraduate and postgraduate level and provides CPD for the British Cattle Veterinary Association as well as directly to groups of vets and producers.

  • AHDB Mastitis Control Plan Deliverer
  • BCVA Accredited Johne’s Veterinary Adviser
  • BCVA Accredited QuarterPro Adviser Training
  • RoMS Accredited Mobility Scorer
  • BCVA Accredited BVDV Veterinary Adviser

James is experienced in all areas of dairy herd health, with particular interest and expertise in mastitis diagnosis and control, and using data to monitor herd health and production.



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