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.
In the book Coren ranked 130 breeds of dog in order of intelligence using three categories of canine cleverness, namely: the instinctive intelligence of the ability to perform the tasks it was bred for, the adaptive intelligence of solving problems on its own, and the obedience intelligence of learning from humans.
Here are the 12 that came top of the brains league - and the dozen who came bottom. They’re still adorable though.
Make sure you don't miss a moment of breaking news from across Scotland by signing up to our free newsletter here.
.jpeg?crop=4:3&trim=&width=800)
17. Borzoi
The Borzoi is a dog with a stunning coat, but a reputation of having little in the way of brains. They are also one of the cleanest breeds though, so perhaps spend so long on their own personal hygiene that they don't have much time for puzzles. | Getty Images
.jpeg?crop=4:3&trim=&width=800)
18. Bloodhound
Scenthounds like the droopy Bloodhound all appear lower down the list of intelligent breeds - largely because once they pick up a scenet they find it very hard to concentrate on anything else. | Getty Images for Empire State Re
.jpeg?crop=4:3&trim=&width=800)
19. Pekingese
The Pekingese was bred as a lap dog for the Chinese Imperial Court - and has exactly the right amount of brains to carry out that task. | Getty Images
20. Beagle
Another dog that has been bred to follow its nose - often in packs - the Beagle could more accurately be called single-minded than stupid. | Hans Lucas/AFP via Getty Images