An 88-year-old woman is fasting for two days in a cage in Oxford's Cornmarket Street to campaign against animal testing.
Joan Court is only drinking water until tomorrow on her "fast for Felix" protest in front of St Michael's Church.
Her protest, which started yesterday, has been organised by People for the Ethical Treatment of Animals (Peta) to mark World Week For Animals in Laboratories.
Miss Court, from Cambridge, said: "I am trying to raise awareness among the people of Oxford at what is happening.
"It is ethically and morally wrong, you should never harm any sentient being."
The fast, which will end with a march through the city centre, is named after Felix, a macaque monkey to be used by Oxford University for research into Parkinson's Disease.
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