Dogs come in all shapes and sizes - the UK Kennel Club recognises 221 different pedigree dogs, from Affenpinscher to Yorkshire Terrier (there are sadly no dog breeds starting with the letter ‘z’!).
Then there are all manner of crossbreeds, from so-called ‘designer dogs’ to lovable mongrels.
Each has its own list of positive and negative attributes, and it’s important to take plenty of time to think about what breed will fit into your lifestyle the best - for instance a smaller dog if you live in a flat, or a hypoallergenic dog if the mere mention of dog hair makes you think about sneezing.
There is even scientific research to guide you, in particular psychologist Stanley Coren’s groundbreaking book The Intelligence of Dogs.
It’s also worth noting that some breeds of dog tend to be naturally cheerier than others - you’d never accuse a Basset Hound of being brimming with joie de vivre.
So, if you’re looking for a dog that has a naturally sunny outlook and a mischievous smile, here are 12 that fit the bill.
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1. Samoyed
Nicknamed the 'Smiling Sammie', this breed literally looks like it’s grinning most of the time. It's the Joker of the dog world, without the evil schemes. Samoyeds are affectionate, sociable, and gentle, with a love for both play and snuggles that keeps them - and their owners - content. | Getty Images
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2. Boston Terrier
With their tuxedo-like coat and bright personality, Boston Terriers are natural entertainers - the dog that would most likely win a spot at the Royal Variety Performance. They are playful, affectionate, and humorous. Their love of clowning around and showing off, means they make everyone around them smile too. | Getty Images
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3. Beagle
The American Kennel Club has it spot on when it describes the Beagle as "happy-go-lucky, merry, and friendly". When most dogs are happy they wag their tails, when a Beagle is happy they somehow manage to wag their entire body at the same time. | AFP via Getty Images
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4. Bichon Frise
The Bichon Frise is known as being a small dog with a BIG happy personality. These wee charmers are hugely affectionate and like nothing better than snuggling up with their owners - making them equally happy. | AFP via Getty Images