WATCH: Tiny abandoned puppy befriends dog 120 times his size
Despite their big differences, a rescued chihuahua has become best friends with a Neapolitan mastiff who is 120 times his weight.
Digby, who is five weeks old and weighs 1lb, was found between two rubbish bins near to flats in north London, the RSPCA said.
But since arriving at Southridge RSPCA Animal Centre in South Mimms, Digby and his nine-stone pal Nero have become inseparable, according to staff.
Nero's owner and centre manager Anna White said: "It was as if the little fellow took on Nero as his personal minder.
"Poor Digby had to be rescued once by the RSPCA and it seems like he is taking precautions to make sure nothing can happen to him again."
RSPCA animal collection officer Natalie Ditchfield added: "It is so lovely to see he is safe and happy. When I first came across Digby he was frozen and shaking. He's really tiny - small enough to fit in the palm of my hand.
"He seemed to come out of his shell as soon as we arrived at Southridge and spotted Nero. It really is a love story."
The RSPCA is investigating how Digby came to be left by the bins and anyone with information is asked to call 0300 123 8018.
Unless an owner comes forward, Digby will be available for rehoming in the coming days.