The Environment Minister says testing is ongoing to determine what caused the deaths last month of more than 100 cows on a Jersey farm.
The Natural Environment team, Woodlands Farm and their private vet have been working together to establish what killed the cows.
The cattle fell ill over a couple of days at in mid-December.
Environment Minister Deputy Jonathan Renouf says the testing is complex, and results are not always conclusive.
"We are, so far, assured that this was a localised event but need additional tests to be able to say more about what has happened in this case."
Samples were taken and analysed from the animals and their feed.
“…the testing process is continuing. We are pursuing the most relevant diagnostic methodologies, in consultation with labs and specialists.”
Initially 33,000 lites of milk from the affected herd was disposed of 'as a precaution' immediately following the deaths.
The Economic Development Minister later reported the impact on lost production was more than one million litres.

New safety measures at Victoria Marine Lake following serious incident
Normans backs Channel 103 celebration of outstanding customer service
Police investigating crash near rugby club
Police chief praises 'positive and good-humoured' football fans
Channel Islands poised for third heatwave of the year
Two dads running 50km to get young stars to Dance World Cup final
Jersey told to avoid Victoria Marine Lake after child pulled through seawall
Jersey pubs can stay open later for England vs Mexico