More than 100 dairy cows at Woodlands Farm in Jersey have fallen ill and died since Thursday, it has been confirmed.
Cattle in a separate part of the herd on the farm have been unaffected, and samples from the feed and the animals have been sent for analysis.
The government said 33,000 litres of milk collected from across the Island on Friday and stored at Jersey Dairy will be disposed of as a precaution.
The cause of the cows' deaths is not yet known, the government said.
Minister for the Environment, Deputy Jonathan Renouf, said it could take "around a week" to get the analysis back from the samples.
He said: "We don't yet know, for sure, what has caused this devastating loss of so many of this dairy herd, and my thoughts are with all those at the farm having to come to terms with what's happened."
He added: "I'm reassured to hear that no milk from the specifically affected sub herd has entered the food chain, and that every precaution has been taken to safeguard public and animal health."
Mr Renouf said discussions were underway about how best to dispose of the milk currently in storage.
The dead cattle have been taken to the Animal Carcass Incinerator, the government said.
Director of Public Health, Professor Peter Bradley, said there was no risk to health, as milk was being disposed of.
He said the situation would be monitored closely over the next couple of days.
Jersey Dairy said investigations were continuing to determine the root cause of what happened at Woodlands.
In a statement, Eamon Fenlon, managing director of Jersey Dairy, said this was "an isolated incident" and no other farms had been affected.
"Everyone at Jersey Dairy is totally devastated with what has happened at Woodlands Farm and our thoughts are with the Le Boutillier family and all their team at this very tragic time," Mr Fenlon said.
He added: "Losing part of a herd like this is heart-breaking.
"We can't imagine how difficult this is for Charlie, his family and all at Woodlands. Words cannot express the heartache we feel for them, and we cannot begin to understand the shock that they must be feeling.
"We hope they can find the strength and guidance to bring them through this difficult and tragic time.
We are very grateful to all who rallied around over the weekend to help at Woodlands in this time of need. It was heartening to see that community spirit."
Mr Fenlon said Jersey Dairy had been working with Public Health to ensure there was no risk to consumers, adding none of the company's products contained milk from the affected farm.
Follow BBC Jersey on Twitter and Facebook. Send your story ideas to channel.islands@bbc.co.uk.
Jersey Dairy discontinues cheese amid rising costs
Shoppers could face increase in milk prices
Farmers get more money for their milk
Government of Jersey
PICTURES: Hundreds take to the water for Christmas Day swim
‘Paid internships could encourage graduates to return to Jersey'
Q&A: Why Christmas is the most wonderful time of the (theatre) year
Arthouse Jersey announces Jèrriais Song Project
Tenth person dies following Jersey explosion
Sanctions targets allowed up to £1 million of Jersey funds to pay lawyers
Civilians flee Kherson as Russian attacks intensify
Top US court keeps curb on migrants crossing border
UN denounces new Taliban restrictions on women
The man on a mission to plant five million trees
Why do Australians love the mullet? Video
What women on minimum wage gave up in 2022
From sharks to salt mouth: My record-breaking UK swim
'What we harvest is worthless'
How true is Hollywood epic Babylon?
The people risking their lives to detonate mines
Prince Harry's Spare to kick off 2023 book bonanza
Young, female and addicted in Somalia
The parents who cut off their children
The treat shared by Jews and Muslims
The 50 best books of the year
© 2022 BBC. The BBC is not responsible for the content of external sites. Read about our approach to external linking.
Jersey cattle: Probe into 100 unexplained deaths – bbc.com
