Dogs come in all shapes and sizes - the Royal Kennel Club (formerly 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 worth noting that some breeds of dog tend to be cheerier than others - you’d never accuse a Bloodhound of being brimming with joie de vivre (although they are still utterly adorable in their own droopy way).
So, if you’re looking for a dog that has a naturally sunny outlook and a mischievous smile - sure to spread joy wherever they go - here are 12 worth popping on your pup shortlist.
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1. Bedlington Terrier
Several Bedlington Terriers have become 'Insta-famous' on social media due to their incredibly smiley faces. They may have been bred to hunt rats, but those Hollywood smiles are now more likely to catch the attention of cameras. | Getty Images
2. Cocker Spaniel
We've known Cocker Spaniels who wag their tails so much that they continue even when they are asleep. This is a happy breed that embrace life to the full - always looking for the next adventure. | AFP via Getty Images
3. Springer Spaniel
What spaniel breed is the happiest - the Cocker Spaniel or the Springer Spaniel? We reckon it's an adorable dead heat. | Getty Images for Westminster Ken
4. 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