How Shirley the labrador uses her nose to stop Rebecca, 7, falling into a coma

Shirley the labrador spends the school day making sure seven-year-old Rebecca Farrar’s life is not in danger.
Rebecca has an aggressive form of type one diabetes which means she could have a hypoglycemic attack and slip into a coma at any time. She cannot tell when this is about to happen but Shirley’s extraordinary nose means that she can smell when the little girl’s blood sugar levels are becoming too high or too low.
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