Mark Taylor / Tricolour merle Collie puppy, Indie, age 10 weeks.

Mark Taylor / Australian Shepherd pup, age 16 weeks, in play-bow stance.

Klein & Hubert / Tabby and white semi-longhaired kitten in defensive posture, arching back and fluffing up tail as two Border collie puppies approach, France.

Jane Burton / Sheltie and Dachshund dogs with their puppies.

Petra Wegner,Petra Wegner / Rough Collie, bitch, 9 months in straw

Florian Möllers / A Malinois / Belgian Shepherd police dog 'Mia' owned by German police officer and dog handler, playing in the snow. Germany

Mark Taylor / German Shepherd Dog bitch pup, Coco, 14 weeks old, with raised paw.

Mark Taylor / Black-and-white Border Collie bitch, with black-and-white tuxedo kitten, 10 weeks NOT AVAILABLE FOR BOOK USE

Mark Taylor / Black-and-white Border Collie bitch, with black-and-white tuxedo kitten, 10 weeks old. NOT AVAILABLE FOR BOOK USE

Mark Taylor / Black-and-white Border Collie bitch, with black-and-white tuxedo kitten, 10 weeks NOT AVAILABLE FOR BOOK USE

Yves Lanceau / Domestic dog, Hungarian Sheepdog / Komondor, female and puppy, France

Petra Wegner / Australian Shepherd, red-tri, close up of paw touching womans hand. Model released

Petra Wegner / Australian Shepherd, red-tri, close up of paw touching womans hand. Model released

Petra Wegner / Briard / Berger de Brie, head portrait with plaited hair between eyes.

Petra Wegner / Border Collie puppy, 13 weeks.

Petra Wegner / Border Collie puppy, 14 weeks, Australian red-white.

Mark Taylor / Blue Bearded Collie puppy, 3 months, yawning.

Mark Taylor / Tricolour Border Collie puppy.

Mark Taylor / Tricolour Border Collie puppy in play-bow.

Mark Taylor / Border Collie bitch, running towards the camera.

Mark Taylor / Black-and-white Border Collie looking at ginger kitten. NOT AVAILABLE FOR BOOK USE

Mark Taylor / Portrait of a Rough Collie puppy, 14 weeks.

Jane Burton / Black-and-white Border Collie bitch lying chin on floor with black-and-white kitten. NOT AVAILABLE FOR BOOK USE

Yves Lanceau / Domestic dog, Old English Sheepdog / Bobtail, studio portrait

Solvin Zankl / Portrait of a Bouvier des Flander cross-breed dog, sitting and panting

Solvin Zankl / Head portrait of a German Shepherd, panting

Mark Taylor / Playful Border Collie puppies, 6 weeks.

Mark Taylor / Border Collie puppy portrait.

Mark Taylor / Border Collie puppy.

Jane Burton / Border Collie having a good shake.

Jane Burton / Sable Border Collie puppy, 9 weeks, looking over his shoulder.

Jane Burton / Border Collie with one of her puppies, 5 weeks, yawning.

Jane Burton / Two Sable Border Collie puppies.

Jane Burton / Chocolate registered Border Collie dog, 9 months.

Jane Burton / White-faced black-and-white Border Collie puppy.

Jane Burton / Portrait of Black-and-white Border Collie bitch.

Jane Burton / Border Collie bitch sitting looking up into the camera.

Jane Burton / Cute Border Collie puppy lying.

Jane Burton / Sable Border Collie puppy, 9 weeks, sitting.

Ernie Janes / Border Collie, working dog looking through gate, Wales, UK

Ernie Janes / Border collie, head portrait, Norfolk, UK, May

Petra Wegner / Australian Shepherd, red-tri coated, portrait lying in snow panting, with picket fence behind

Petra Wegner / Australian Shepherd, red-tri coated, portrait sitting in snow, with picket fence behind

Petra Wegner / Australian Cattle Dog, portrait lying down in straw with Pumpkins / Squash

Petra Wegner / Bobtail / Old English Sheepdog running towards camera, panting.

Petra Wegner / Group portrait of five dogs sitting, from left to rt: two mongrels, Rough Collie, Bobtail (Old English Sheepdog) and longhaired Chihuahua.

Petra Wegner / Group portrait of five dogs sitting, from left to rt: two mongrels, Rough Collie, Bobtail (Old English Sheepdog) and longhaired Chihuahua.

Petra Wegner / Bobtail / Old English Sheepdog, lying with a longhaired Chihuahua, tan and white coated.