She may look like any other dog, but with the touch of a paw or a bark, Aster has helped change Elenor Clark's life.
Elenor has been living with diabetes for nearly 30 years, but five years ago her condition worsened leaving her having sudden low or high blood glucose levels without warning and ending up in hospital every few weeks.
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Elenor applied for a medical detection dog and says that when she met labrador/retriever cross Aster they had an immediate connection. The dogs are trained to smell the chemical body changes that occur as the insulin levels increase or drop. Usually the training takes place over a number of months, but Elenor said Aster alerted her during her first walk and went on to alert her a further eight times within a week of them meeting.
If Aster senses a change in Elenor, she will paw her knee, rub her leg or arm, jump up, or steal her book - anything to get Elenor's attention. Elenor then tests her blood and if her levels are too low, she eats and if they're too high, she takes insulin.
Elenor says Aster has changed her life completely, helping her to get out and even take a holiday for the first time in years.
You can find out more about medical detection dogs here.
Watch Alexandra Lodge's full report here: