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.
But if you want a pup that will do two laps of the park before more of its canine friends have done one, there are a few dogs you should have at the top of your list.
Here are 12 of the fastest dog breeds in the world.
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1. Greyhound
It probably comes as no surprise that the fastest breed of all is the Greyhound. They are born to run, although are surprisingly lazy the rest of the time, and have an incredible top speed of 45mph. | Canva/Getty Images
2. Saluki
One of the most ancient breeds of dog, the Saluki is thought to date back to ancient Egypt. With a top speed of 42mph they are the second fastest dog breed. | AFP via Getty Images
3. Afghan Hound
In joint bronze medal position for quickest canine is the Afghan Hound. At top speed they are a blur of fur, running at 40mph. | Getty Images for Westminster Ken
4. Vizla
The other dog that can register up to 40mph on the canine speedometer is the Vizla. If this Hungarian breed doesn't get plenty of exercise it can become destructive. | Getty Images