Ernie Janes,Ernie Janes / Yellow Labrador jumping breakwater, Norfolk. April

Petra Wegner / Chihuahua, longhaired puppy, 9 weeks, standing portrait.

Mary McDonald / Dhole / Asiatic Wild Dog (Cuon alpinus). Satpura National Park, Madhya Pradesh, India.

Mark Hamblin / 2020VISION / Man walking with dog along footpath through young Scots pine trees, Little Assynt Estate, near Lochinver, Assynt, Sutherland, NW Scotland, UK, January 2011, Model released

Andy Rouse / Man playing in deep snow with dogs (two German shepherds and a spaniel) on closed road on Caerphilly Mountain, Caerphilly, South Wales, UK, December 2010, Model released

Jeff Vanuga / Horse and dog silhouetted at dusk. Bighorn Basin, Wyoming, USA. Model released

LYNN M. STONE / Golden Retriever puppy walking through snow by a small twig with berries. Big Rock, Illinois, USA, February.

Ernie Janes / Beech trees at Felbrigg Great Wood, Norfolk, UK, November 2008

ASHISH & SHANTHI CHANDOLA / Rabari caravan with women leading camels loaded up for the journey, Kutch, Gujarat, India, August 2009

Tim Laman / Dog walking along bridge walkway, and homes in Waifoy Village, Mayalibit Bay, Waigeo Island, West Papua, Indonesia, April 2007

Mark Taylor / Basset Hound puppy, Betty, 9 weeks, walking across.

Norbert Wu / Sam and Ange walking each other, Golden and Yellow Labrador Retriever (Canis familiaris) mix, Carmel, California