Pippa, who was saved by the Jansa family from an RSPCA centre, is able to sense when Mia Jansa's blood sugar levels drop at night, which would lead to her slipping into a life-threatening coma.
But before this can happen, the black and white moggy wakes Mia's mum, Laura, who can then give her glucose tablets or an insulin injection.
Laura, 40, said to the Daily Star: "She has had no training, yet somehow she understands the importance of Mia's situation. When Mia's levels are low, Pippa bats at her door before coming into my bedroom and waking me up during the night."
Pippa has now saved Mia three times by awakening Laura, from Whitstable, Kent, just in time.
She added: "It is really nice to have Pippa as my back-up."
What a purr-fect cat!
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