"She has made a huge change to my general health and wellbeing, along with the control of my diabetes," Ms Parry told the Herald.
So to return thanks to Diabetes NZ and Kotuku Foundation Assistance Animals Aotearoa, a charity for which Mr Calkoen helps train medical response dogs, Ms Parry and Ada will run the 8.4km stretch from downtown to St Helier's Bay while raising cash and awareness for the two groups.
Ms Parry and Ada have already raised more than $1500, helping the Diabetes NZ's Auckland branch "Team Blue", sponsored by Sanofi and Rapid Fitness, to achieve second place in fundraising among the teams taking part.
In preparation for the race, the pair have been putting paws and feet to pavement around their neighbourhood in Beachhaven.
"She comes with me everywhere. But because she is a working dog, I still need to make sure we keep a balance and that I don't over-tire her by running too much."
After work-outs, the laid-back and cheerful canine cools down in a paddling pool Ms Parry has set up at home.
While their ultimate goal is to complete a half marathon together, their first step will be getting other contestants used to the sight of a six-legged team.
"I imagine it's probably not what people are going to be expecting."
• To support Vicki and Ada's cause with a donation, search for "Six Legs" on the fundraising website www.everydayhero.co.nz.