Scores of people have been photographed over the decades alongside their pooches, come rain, wind or shine.
1. Three musketeers
Three boys found this lost dog in 2003. Photo: TC
2. Dog micro-chipping
A god micro-chipping scheme launched in 2003. Pictured are Denise Gilgallon, from the NCDL, dog warden Mick Lapworth, from Hartlepool Borough Council, and Potsy the dog. Photo: Wood
3. Man and his dog
Alan Hepworth poses for a photo with his dog Barnie in 2008. Photo: Frank Reid
4. Summerhill dog show
Members of the public enjoy a dog show at Summerhill Country Park in 2007. Photo: Frank Reid