He brakes for nothing - except traffic, cats and other interesting smells.
Kody the three-year-old Jack Russell has turned out to be the perfect little motor for his owner's wheelchair.
Strapped into a special harness, with his brown ears flapping in the breeze, he takes Alan Smith for walkies every day in Clifton, Nottingham.
Dogged determination: Alan Smith lets Kody do all the work as the pair take a spin
Mr Smith says his pet hauls the load along at up to 15mph, making for a bone-shaking ride on the rough pavements.
The 57-year-old, who had polio as a baby, said: 'He will stop at the roads and look for traffic. His only downfall is if he sees a cat or another dog - he stops and crouches like a tiger.
'His muscles are strong and the vet says he's very healthy.'
Mr Smith said Kody fittingly will not eat any other dog food other than a supermarket brand called 'Hero'.
'He just turns his nose up at any other kind of food - we've tried everything,' he added.
Don't paws now: Alan is confined to a wheelchair after his bones were weakened by polio
His wife Donna, 49, originally from Canada, has been his full-time carer since then.
But the talents of their loyal pet do not stop at helping give his owner a daily dose of fresh air.
'Kody usually brings small items of clothing, if you ask him for your shoes and socks he'll bring you them,' Mrs Smith added.
The couple initially bought Kody for companionship, but soon found they had discovered a second carer for Mr Smith.
He said: 'He takes me out for half an hour every day and it gives Donna a rest.
'He's a wonderful companion and when we're out it's just the two of us against the world.
'He gets to run which is good exercise for him.
'But sometimes you can be doing 15 miles per hour on the bad Clifton pavements - it shakes my innards up something rotten!'
Chariots of Fido: Meet Kody the dogged Jack Russell terrier who pulls his wheelchair-bound owner around the streets | Mail Online