From the BBC
Mice star as Olympic food tasters
White mice are to take part in the 2008 Olympic Games in Beijing - their task to protect international athletes from food poisoning.
The mice will be fed milk, alcohol, salad, rice, oil and seasonings, the city's health inspectors said.
Mice show adverse reactions within 17 hours, while laboratory tests take much longer, they said.
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All the food and ingredients to be prepared in Olympic kitchens will fed to the mice a day before they are served to athletes, state news agency Xinhua quoted Zhao Xinsheng of the Beijing Municipal Health Inspection Bureau as saying.
Infected food can then be traced and destroyed in time.
Ah! The safety of day old food.