Ingo Arndt / View of Mount Rushmore National Memorial, South Dakota, USA, September 2009

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

Mark Taylor / Tricolour Border Collie puppy.

Fiona Rogers / Bornean Orang-utan (Pongo pygmaeus wurmbii) female baby 'Petra' aged 12 months portrait. Camp Leakey, Tanjung Puting National Park, Central Kalimantan, Borneo, Indonesia, July 2010. Rehabilitated and...

Juan Carlos Munoz / Magellanic penguin (Spheniscus magellanicus) flapping its wings, with another lying down. Puerto Deseado, Patagonia, Argentina, Nov 2008

Anup Shah / Golden langur {Presbytis geei} sticking its tongue out, India

Larry Michael / Domestic cat investigating goldfish bowl, USA

Jose B. Ruiz / Barbary apes playing on motorcycle {Macaca sylvanus} Gibraltar, Spain

Anup Shah / Western chimpanzee (Pan troglodytes verus) juvenile female 'Joya' aged 6 years throwing a rock at female 'Velu' aged 51 years, Bossou Forest, Mont Nimba, Guinea. January 2011.

Anup Shah / Western chimpanzee (Pan troglodytes verus) juvenile female 'Joya' aged 6 years throwing stones at other chimpanzees, Bossou Forest, Mont Nimba, Guinea. January 2011.

Anup Shah / Western chimpanzee (Pan troglodytes verus) juvenile female 'Joya' aged 6 years throwing rocks at other chimpanzees, Bossou Forest, Mont Nimba, Guinea. January 2011

Petra Wegner / Pug, 8 weeks, black puppy, urinating.

Petra Wegner / Sheltie / Shetland Sheepdog puppy, 4 1/2 months, chewing on slipper and destroying toy.

Petra Wegner / Cavalier King Charles Spaniel puppy, tricolour, 13 weeks, chewing at carpet.

Petra Wegner / Cavalier King Charles Spaniel, blenheim, going through rubbish

Petra Wegner / Woman and Cavalier King Charles Spaniel puppy tricolour, 9 weeks, being told not to bite wires.

Petra Wegner / Cavalier King Charles Spaniel, blenheim, naughtily looking through rubbish.

Petra Wegner / Cavalier King Charles Spaniel, ruby, going through rubbish

Petra Wegner / Ferret (Mustela putorius forma domestica) in handbag.

Petra Wegner / Groenendael / Belgian Shepherd Dog destroying toy.

Petra Wegner / Cavalier King Charles Spaniel, tricolour, going through rubbish

Petra Wegner / Ferret (Mustela putorius forma domestica) in handbag.

Petra Wegner / Cavalier King Charles Spaniel, ruby, going through rubbish

Petra Wegner / Sheltie / Shetland Sheepdog puppy, 4 1/2 months, destroying toy.

Petra Wegner / Groenendael / Belgian Shepherd Dog destroying toy.

Petra Wegner / Sheltie / Shetland Sheepdog puppy, 4 1/2 months, chewing on slipper and destroying toy.

Petra Wegner / Cavalier King Charles Spaniel, tricolour, going through rubbish

Petra Wegner / Australian Shepherd puppy, blue-merle, investigating slipper.

Petra Wegner / Cavalier King Charles Spaniel, blenheim, going through rubbish

Petra Wegner / Cavalier King Charles Spaniel, black-and-tan, making a mess with rubbish.

Petra Wegner / Groenendael / Belgian Shepherd Dog destroying toy.

Petra Wegner / Sheltie / Shetland Sheepdog puppy, 4 1/2 months, playing with slipper.

Petra Wegner / Cavalier King Charles Spaniel puppy, tricolour, 9 weeks, biting electrical wire.

Petra Wegner / Cavalier King Charles Spaniel, black-and-tan, going through rubbish

Petra Wegner / Cavalier King Charles Spaniel, black-and-tan, making a emss with rubbish.

Petra Wegner / Ferret (Mustela putorius forma domestica) playing with box.

Petra Wegner / Ferret (Mustela putorius forma domestica) escaping from box.

Petra Wegner / Ferret (Mustela putorius forma domestica) in slipper.

Petra Wegner / Australian Shepherd puppy, black-tricolour, urinating on carpet.

Petra Wegner / Cavalier King Charles Spaniel, blenheim, going through rubbish

Petra Wegner / Sheltie / Shetland Sheepdog puppy, 4 1/2 months, chewing on slipper and destroying toy.

Petra Wegner / Cavalier King Charles Spaniel, puppy, 5 months, tricolour, going through rubbish

Petra Wegner / Ferret (Mustela putorius forma domestica) escaping from a hamper.

Petra Wegner / Ferret (Mustela putorius forma domestica) hiding in box.

Petra Wegner / Cavalier King Charles Spaniel, puppy, tricolour, 9 weeks, biting wire of an electrical extension.

Petra Wegner / Cavalier King Charles Spaniel, blenheim, going through rubbish

Petra Wegner / Cavalier King Charles Spaniel puppy, tricolour, 9 weeks, destroying roll of paper.

Petra Wegner / Cavalier King Charles Spaniel puppy, tricolour, 9 weeks, destroying roll of paper.

Petra Wegner / Cavalier King Charles Spaniel puppy, tricolour, 9 weeks, destroying roll of paper.

Petra Wegner / Cavalier King Charles Spaniel puppy, tricolour, 13 weeks, staning by excrement.

Petra Wegner / Cavalier King Charles Spaniel puppy, tricolour, 13 weeks, sniffing at excrement.

Petra Wegner / Cavalier King Charles Spaniel. puppy, tricolour, 9 weeks, destroying roll of paper.

Ernie Janes / Yellow Labrador retriever puppy playing with newspapers, UK

Ernie Janes / Yellow Labrador retriever puppy resting amongst newspaper, UK

Ernie Janes / Yellow Labrador retriever puppy playing amongst newspapers, UK

Ernie Janes / Yellow Labrador retriever puppy chewing hiking boots

Ernie Janes / Yellow Labrador retriever puppy chewing hiking boots

Ernie Janes / Golden retriever, puppy resting on straw chewing the laces of hiking boot

Aflo / ic-03108 Young domestic kitten walking along piano keyboard {Felis catus}

Aflo / ic-03107 Young domestic kitten in knitting {Felis catus}

Angelo Gandolfi / Barbary ape (Macaca sylvanus) playing on car bonnet, smearing windscreen with mud. Ifrane Nature Reserve, Middle Atlas, Morocco.

Mark Taylor / Belgian Shepherd Dog puppy, Antar, 10 weeks, chewing a child's shoe.

Mark Taylor / Belgian Shepherd Dog puppy, Antar, 10 weeks, chewing a child's shoe.

Mark Taylor / Blue-and-white Jack Russell Terrier puppy, Scamp, chewing a child's shoe.

Mark Taylor / Blue-and-white Jack Russell Terrier puppy, Scamp, with child's shoes.

Mark Taylor / Blue-and-white Jack Russell Terrier puppy, Scamp, chewing a child's shoe.

Mark Taylor / Blue-and-white Jack Russell Terrier puppy, Scamp, chewing a child's shoe.

Mark Taylor / Blue-and-white Jack Russell Terrier puppy, Scamp, with child's shoes.

Mark Taylor / Blue-and-white Jack Russell Terrier puppy, Scamp, investigating a child's shoe.

Petra Wegner / Blenheim Cavalier King Charles Spaniel, 5 months, tearing up a magazine

Petra Wegner / Blenheim Cavalier King Charles Spaniel, 5 months, tearing up a magazine

Petra Wegner / Mixed Breed Dog tearing up a magazine

Petra Wegner / Mixed Breed Dog tearing up a magazine

Petra Wegner / Tricolor Cavalier King Charles Spaniel playing in torn up paper

Petra Wegner / Mixed Breed Dog playing in torn paper

Petra Wegner / Mixed Breed Dog tearing up a magazine

Jane Burton / Blue merle Border Collie pup pulling 6-year-old boy's shirt.

Jane Burton / Lakeland x Border Collie pup chewing the laces of a pair of shoes

Jane Burton / Black Labrador pup destroying boot cleaner.

Jane Burton / Cream Dapple Miniature Long-haired Dachshund pup snapping.

Jane Burton / Yellow Labrador Retriever pup wrapped in tinsel and chewing on a decoration

Jane Burton / Yellow and Chocolate Labrador Retriever pups chewing on Christmas decorations.

Petra Wegner / Domestic dog, Small Dutch Waterfowl Dog / Kooiker Hound / Kooikerhondje puppy, 3 months, wrapped with toilet paper

Petra Wegner / Cavalier King Charles Spaniel (tricolour) wrapped in toilet paper

Petra Wegner / Domestic dog, Small Dutch Waterfowl Dog / Kooiker Hound / Kooikerhondje puppy, 3 months, playing with roll of toilet paper

GEORGETTE DOUWMA / Grey squirrel {Sciurus carolinensis} feeding from bird feeder, UK.

Jose B. Ruiz / Barbary apes playing on motorcycle {Macaca sylvanus} Gibraltar, Spain

John Cancalosi / Barbary ape on car {Macaca sylvanus} Gibraltar

John Cancalosi / Barbary ape plays with car aerial {Macaca sylvanus} Gibraltar

Petra Wegner / German Hunting Terrier, puppy bitch, 8 weeks, biting trouser-leg

Petra Wegner / German Hunting Terrier, puppy bitch, 8 weeks, biting at shoe

Petra Wegner / German Hunting Terrier, puppy bitch, 8 weeks, biting trouser-leg

Petra Wegner / German Hunting Terrier, puppy bitch, 8 weeks, biting trouser-leg

Petra Wegner / Three Coton de Tulear puppies, 8 weeks, lying on a rug, playing

Yves Lanceau / Domestic tabby Cat (Felis catus) watching goldfish (Carassius auratus) in a glass bowl.