The discovery was made at a branch in Martineau Place, Birmingham, by researchers looking into food hygiene standards at popular takeaway joints.
Swabs of the drinks were sent off to Leeds Beckett University where researchers found 'high levels' of faecal coliform, the bacteria present in poo, in the drinks.
The discovery was made during BBC One's Rip Off Britain show.
Dr Margarita Gomez Escalada said: 'We found high levels of bacteria in the ice. The presence of faecal coliform suggests that there's faecal contamination either on the water that made the ice, or the ice itself, and so it increases the risk of getting sick from consuming this ice.'
Janet Cox, Head of Health, Safety and Environment at KFC UK&I, told Metro.co.uk that they were 'extremely disappointed by the ice test results and immediately launched an investigation.'
'We have also undertaken a retraining programme with all team members on our standards for touch point cleaning and procedures.'
Referring to the zero rating, she said it was 'completely unacceptable' and that they have been working to 'get the restaurant back to our high standards.'
Following a recent inspection of Martineau Place, the branch has now been given a hygiene rating of five out of five.
METRO.CO.UK
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