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Cattle Health
Atypical copper poisoning in Jersey dairy herds
  1. N. F. Suttle,
  2. H. M. Martineau,
  3. A. G. Hunter,
  4. J. R. Thomas and
  5. A. I. Macrae
  1. Moredun Foundation and Research Institute, Pentlands Science Park, Penicuik, Midlothian EH26 0PZ
  2. Royal Veterinary College, North Mymms, Hatfield, Hertfordshire AL9 7TA
  3. SAC Consulting, Veterinary Services, Bush Estate, Penicuik, Midlothian EH26 0QE
  4. Dairy Herd Health and Productivity Service, Royal (Dick) School of Veterinary Studies and Roslin Institute, University of Edinburgh, EBVC, Roslin, Midlothian EH25 9RG

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IN a paper published in Veterinary Record in March last year, Bidewell and others (2012) highlighted the susceptibility of dry Jersey cows in a mixed herd to pre- and post-haemolytic copper poisoning (HCP). The authors speculated that an abrupt change of diet to barley straw for ‘drying off’ may have been a predisposing factor.

In our own study of a pure Jersey herd receiving more supplementary copper, particularly during the dry period (41 or 46 mg Cu/kg dry matter [DM] v 20 mg Cu/kg DM) (Hunter and other 2013), there was no evidence of either pre- or post-HCP in dry or lactating cows, before or after intervention. Supplementary …

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