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SINCE the beginning of October, Animal Health and Veterinary Laboratories Agency (AHVLA) regional laboratories and SAC disease surveillance centres have been investigating unusual incidents of clinical respiratory disease presentations in calves on four farms. All affected calves have received medicated calf starter pellets that included a decoquinate premix.
Affected calves, aged two to three months, have typically presented with tachypnoea/dyspnoea for two to eight days before death or euthanasia, and no clinical response was noted following treatment for suspected pneumonia. Pyrexia was a variable feature. However, one …