Millie, a black Labrador from Canine Partners, is an assistance dog for Paul McKenzie from Staffordshire.
He has severe neuropathy and Type 1 diabetes and can collapse if his blood suger levels are too low or high.
An emergency Lifeline button is installed in Paul's house that Millie has been trained to press, if Paul becomes unconscious.
When Millie pressed the button, the team at Lifeline tried to speak to Paul but after hearing nothing for a minute they called an ambulance. Paramedics found Paul on the floor, unconscious, with low blood sugar levels.
Millie is trained to assist Paul around the house with tasks such as fetching the post, opening doors and taking his shoes and socks off.