WE all know that dogs are man’s best friend, but what makes our relationship with our fourlegged, furry friends so special?

The latest edition of The Wonder of Dogs aims to find out by delving deep into the psychology of the human-dog relationship.

Research suggests that of all the animals on the planet, dogs have evolved most when it comes to reading human behaviour, even better than our closest living relative, the chimpanzee.

There is also a look at the naturenurture debate – how much of our pets’ behaviour is part of their genetic makeup, and how much has been developed in response to their owners?

Hankies at the ready for Ruth Goodman’s report on Greyfriars Bobby, the Skye terrier whose devotion to his dead master continues to move dog-lovers everywhere.