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Information and public services for the Island of Jersey

L'înformâtion et les sèrvices publyis pouor I'Île dé Jèrri

Update on testing following cattle deaths

15 February 2023

The cattle which died suddenly in large numbers on a Jersey farm, most likely died from botulism, the Island’s Chief Veterinary Officer has said.

More than 100 cows at Woodlands Farm died over the course of a few days in mid-December.

Although the results of Government-commissioned tests on the cattle feed have found no toxins present, toxin-producing bacteria were cultured from samples. 

Chief Veterinary Officer, Susana Ramos, said: “Botulism has been our main working theory throughout. It’s characterised by progressive muscle weakness. Cattle are extremely sensitive to the toxin, and in most cases it is fatal.

“Botulism is notoriously hard to test for, and diagnosis is often based primarily on the clinical signs and by ruling out other possible causes.

“Despite no toxin being found, there was the presence of bacterial spores, and we believe that these results, coupled with the exclusion of notifiable diseases, and the signs reported at the time at the farm, all combine to suggest botulism as the most likely cause of death.” 

The results of the feed sampling, analysed by scientists in the UK, came through to the Government of Jersey on Thursday night. 

Director of Natural Environment, Willie Peggie, added: “We have been able to rule out a number of causes, by a process of elimination but have not been able to identify the toxin; we were aware from the outset that a conclusive laboratory result might not be achievable. 

“We have no reason to believe that there is any further risk to animals, or any risk to the general public.” 

Notes to Editors:

  1. 1. For further information, please contact the press office on +44 (0) 1534 440430 or

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