Ingo Arndt / Racka sheep herd {Ovis aries} rare breed from Hungary

Mark Taylor / Black and white Jack-a-poo, Jack Russell cross Poodle, pup, 8 weeks old, jumping up.

Mark Taylor / Cockapoo, Cocker spaniel cross Poodle puppy sitting.

Mark Taylor / Cockapoo, Cocker spaniel cross Poodle puppy on hind legs.

Jane Burton / Cocker spaniel x poodle (Cockapoo) cross puppies resting with parents.

Jane Burton / Pug x Shih-tzu (Pugzu) cross puppies with parents.

Jane Burton / Sheltie and Dachshund dogs with their puppies.

Mark Taylor / Cute chocolate Toy Goldendoodle puppy in play-bow.

Mark Taylor / Black Maine Coon kitten and cute Doxiedoodle puppy.

Juan Carlos Munoz / Iberian black pig in oak woodland, Sierra de Aracena Natural Park, Huelva, Andalucia, Spain, Europe. Breed used to produce Iberico ham / Jamon Iberico

Juan Carlos Munoz / Iberian pig with mud covered snout, Sierra de Aracena Natural Park, Huelva, Andalucia, Spain, Europe. Breed used to produce Iberico ham / Jamon Iberico

Juan Carlos Munoz / Iberian black pig foraging in oak woodland, Sierra de Aracena Natural Park, Huelva, Andalucia, Spain, Europe. Breed used to produce Iberico ham / Jamon Iberico

Florian Möllers / 'Jogi', a Jack Russell Terrier cross breed, male playing in the snow. Germany

Kristel Richard / Wild Chincoteague (Equus caballus) two breeding stallions greeting one another, Chincoteague National Wildlife Refuge, Chincoteague Island, Virginia, USA, June

Kristel Richard / A herd of Retuerta mares trotting, Guadiamar scientific reserve, Donana National Park, Andalusia, Spain. This breed of horse was close to extinction in the 1990s with only 5 individuals left, but now...

Merryn Thomas / Domestic dog (3/4 Tibetan Terrier, 1/4 Cocker Spaniel) with ball. Isles of Scilly, UK, December 2011.

Ernie Janes / Yellow Labrador running in snow, UK

Nick Turner / Cotswolds Lion rare breed sheep (Ovis aries) and the village of Naunton at sunset, Gloucestershire, UK, June 2001.

Petra Wegner / Mixed breed, white, long haired Cockerpoo / Cockapoo dog, standing on back legs, looking up. Poodle Cocker spaniel cross

Petra Wegner / Mixed breed, white, long haired Cockerpoo / Cockapoo dog, head portrait. Poodle Cocker spaniel cross,

LYNN M. STONE / Mixed-breed piglet in straw, Maple Park, Illinois, USA

LYNN M. STONE / Mixed-breed piglet in wooden box with sunflowers, Maple Park, Illinois, USA

LYNN M. STONE / Sleeping mixed-breed piglet in straw, Maple Park, Illinois, USA

Petra Wegner / Mixed Breed puppy, 12 weeks / Pug crossbred, sitting on small sofa with reindeer toy.

Kristel Richard / A rare Sorraia stallion cantering, Coudelaria Nacional (National Stud Farm), in Alter do Chao, District of Portalegre, Alentejo, Portugal.

Kristel Richard / Portrait of a rare Sorria stallion, Reserva Natural do Cavalo do Sorraia, Alpiarca, District Santarem, Alentejo, Portugal.

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

Ernie Janes / Farmyard chicken (Gallus gallus domesticus) free range, mixed breed, Norfolk, UK. Property released

Ernie Janes / Farmyard chickens (Gallus gallus domesticus) free range, mixed breed, two perched on tractor bonnet, Norfolk, UK. Property released

Ernie Janes / Farmyard chicken (Gallus gallus domesticus) free range, mixed breed, perched on fence, Norfolk, UK. Property released

Petra Wegner / Smooth haired Dachshund, black and tan, with with Whippet standing over

Petra Wegner / Mixed Breed Dog head portrait, with toy rope in her mouth.

Petra Wegner / Portrait of a mixed breed dog with bow in her hair, and a toy rope in her mouth.

Petra Wegner / Mixed Breed dog running on grass, towards camera.

Stephen Dalton / Close up of eye of Domestic dog, Alsatian or German shepherd breed, UK

Wild Wonders of Europe / della Ferrera / Slavonian Syrmian cattle (rare breed) in meadow between Krapje and Drenov Bok, Lonjsko Polje Nature Park, Sisack-Moslavina county, Slavonia region, Posavina area, Croatia, June 2009

Wild Wonders of Europe / della Ferrera / Slavonian Syrmian cattle (rare breed) in the meadows between Krapje and Drenov Bok, Lonjsko Polje Nature Park, Sisack-Moslavina county, Slavonia region, Posavina area, Croatia, June 2009

Mark Taylor / Black Terrier-cross puppy, Maisy, 3 months, portrait

Mark Taylor / Border Collie-cross bitch, Bliss, snarling, looking aggressive.

LYNN M. STONE / Domestic cow {Bos taurus} sniffing camera, milking shorthorn breed, USA

Dan Burton / Piglets suckling {Sus scrofa domestica} UK

John Cancalosi / Shetland Pony, native breed of Shetland Islands, Scotland, UK

John Cancalosi / Rare breed domestic Churro sheep, NM, USA.

Dan Burton / Rare breed domestic Sussex cow {Bos taurus} UK.

Mitsuaki Iwago / Kishu Inu (Canis familiaris) two puppies playing with a twig, Japan

Mitsuaki Iwago / Kishu Inu (Canis familiaris) two puppies playing with a twig, Japan

Juan Manuel Borrero / Mule - offspring of male donkey and female horse - Spain

LYNN M. STONE / Beagle dog puppy {Canis familiaris}

LYNN M. STONE / Dachshund dog puppies - smooth haired (left) and wire haired (right)

LYNN M. STONE / Domestic cow, Ayrshire breed, USA

Colin Seddon / Scottish black-faced breed ram {Ovis aries} Scotland, UK

Niall Benvie / Domestic cow - Ayrshire breed, Scotland

LYNN M. STONE / Beagle running through snow {Canis familiaris} USA

TJ Rich / Berkshire pig, close up of curly tail, rear view. Surrey, England, UK.

TJ Rich / Berkshire pig, three gilts feeding at trough. Surrey, England, UK.

TJ Rich / Berkshire pig, two gilts foraging in soil. Surrey, England, UK.

TJ Rich / Berkshire pig, portrait of gilt. Surrey, England, UK.

TJ Rich / Berkshire pig gilt foraging in pig sty. Surrey, England, UK.

TJ Rich / Wilsthire horn sheep with self shedding fleece, portrait. Surrey, England, UK.

TJ Rich / Wilsthire horn sheep with self shedding fleece, portrait. Surrey, England, UK.

TJ Rich / Wilsthire horn sheep with self shedding fleece, portrait. Surrey, England, UK.

TJ Rich / Wilsthire horn sheep with body bare of self shedding fleece, portrait. Surrey, England, UK.

TJ Rich / Wilsthire horn sheep with body bare of self shedding fleece, portrait. Surrey, England, UK.

TJ Rich / Black and white mongrel sitting amongst Bluebells, portrait. Gopher Wood SSSI, Marlborough Downs, Wiltshire, England, UK. May.

Tony Heald / Domestic goose (Anser anser), Embden breed in morning light, portrait. Water droplet on end of beak. Namibia.

David Woodfall / Cross breed sheep and abandoned croft on machair, North Uist, Scotland, UK, June.

TJ Rich / Black cockpoo sitting. Wiltshire, UK

TJ Rich / Black cockpoo sitting at cottage door. Wiltshire, UK

TJ Rich / Black cockapoo in garden. Wiltshire, UK

TJ Rich / Golden cockapoo puppy, Welford Park, Berkshire, UK

Ernie Janes / Ankole cattle (Bos taurus taurus) African domesticated cattle breed

Ashley Cooper / Border Collie dog lieing amongst bluebells in the Lake District, England, UK. May.

Mark Taylor / Cavapoo dog, Monty, 10 months, walking.

Mark Taylor / Cavapoo dog, Monty, 10 months, walking.

Mark Taylor / Cavapoo dog, Monty, 10 months, standing.

Mark Taylor / Cavapoo dog, Monty, 10 months, walking.

Mark Taylor / Cavapoo dog, Monty, 10 months, lying with head up.

Mark Taylor / Cavapoo dog, Monty, 10 months, sitting.

Mark Taylor / Cavapoo dog, Monty, 10 months, sitting and looking up.

Mark Taylor / Cavapoo dog, Monty, 10 months, sitting.

Mark Taylor / Schnoodle dog lying with head up.

Mark Taylor / Cavapoo dog, Monty, 10 months, sitting and looking up.

Mark Taylor / Cavapoo dog, Monty, 10 months, running.

Mark Taylor / Cavapoo dog, Monty, 10 months, running.

Mark Taylor / Tricolour Daxie-doodle dog, Dougal, and wire-haired Dachshund.

Mark Taylor / Tricolour Daxie-doodle dog, Dougal, and wire-haired Dachshund.

Mark Taylor / Tricolour Daxie-doodle dog, Dougal, and wire-haired Dachshund.

Mark Taylor / Cavapoochon puppies,age 6 weeks.

Mark Taylor / Goldendoodle puppy with raised paw.

Mark Taylor / Red Poodle, Goldendoodle, and two Cavapoo puppies sitting in a row

Mark Taylor / Two Cavapoo puppies.

Mark Taylor / Two red Cavapoo puppies.

Mark Taylor / Red Dachshund puppy and Cavapoo puppy.

Mark Taylor / Four Cavapoo puppies, age 7 weeks, sitting.