The Devon farmer who won a second TB test on a calf has admitted defeat in her campaign to keep it alive.
Post mortem results will show if Fern had bovine TB
Sheilagh Kremers' Dexter bull calf, Fern, will have to be slaughtered after testing positive for bovine TB.
The calf was tested again after the government admitted the original test had not been carried out properly.
Ms Kremers had previously refused to allow Defra officials to remove Fern from her farm at East Ogwell, near Newton Abbot.
She said it was not easy to accept that Fern now had to be slaughtered.
She told BBC News: "The result doesn't mean that Fern has TB. He is a reactor, according to the skin test.
"He has a perfectly healthy immune system and we are killing our strongest cattle."
Mrs Kremers has said that being a TB reactor meant the calf had only a 20 to 30% chance of having the disease.
"The skin reaction test is a test for immunity. Only about 20 to 30% of those killed are positively identified at post mortem with lesions," she said.
The Department for Environment, Food and Rural Affairs said the positive reaction meant the calf had to be slaughtered under UK and European law.