London, UK – Animal lovers are in an uproar over the fate of an alpaca who is causing quite the stir in the UK.

Crowds of animal rights protesters marched in London on Monday, yet Britain's government insists there can be no reprieve for Geronimo the alpaca.

Geronimo has tested positive twice for bovine tuberculosis (TB), and the Department of Food, Environment, and Rural Affairs (DEFRA) has ordered that he be euthanized.

His owner, Helen Macdonald, who imported him from New Zealand, believes the tests are returning false positives and that the specific tests are not validated, but has been refused permission to have him tested a third time.

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Last week, Macdonald lost her final appeal to save her beloved pet at the High Court in London and now a warrant has been signed for his destruction.

She has received an outpouring of support from the public, with more than 100,000 people signing a petition calling on British Prime Minister Boris Johnson to halt the killing. Even some British celebrities have weighed in.

Around 30 people, including fellow alpaca farmers who had lost animals in similar circumstances, gathered outside DEFRA's headquarters in Smith Square, Westminster on Monday.

Several alpacas who were reportedly due to attend the march were not brought along due to safety concerns.

The campaigners believe that Geronimo is free of TB and that DEFRA's tests are highly likely to be inaccurate. They are demanding a different type of test be used to prove Geronimo's disease status to prevent his death.

But Downing Street insisted that all the evidence on the animal's condition has been "looked at very carefully."

The prime minister's official spokesperson said, "We know how distressing losing animals to TB is for anyone. That is why the Environment Secretary has looked at this extremely carefully and interrogated all the evidence.

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Macdonald criticized the government for refusing to change its mind.

"Unfortunately they are still misquoting data," she said. "We are just asking to have him tested with something appropriate. I get they have policy to follow, but there are other ways, and they don't have to kill him. He is safe in isolation."

Geronimo's owner has threatened to film the last moments of her alpaca's life if he is put down, and broadcast it on social media.

"This is an animal injustice," she finished. "We can make a difference. Geronimo is the poster boy for doing a better job than what we have done in the past."

She and alpaca owners are now calling for urgent talks with the government, as the life of Geronimo hangs in the balance.