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.
Before becoming one of the one-in-three UK households with at least one four-legged friend, you should ask yourself whether you have a lifestyle that means you’ll be needing to regularly leave your pup alone in the house for a few hours.
Separation anxiety can be a real problem when it comes to pet dogs - causing barking, destructive behaviour or even aggression.
Certain breeds are known to be more likely to develop the condition than others, so it’s important to do your research
Here are 12 breeds of dog most likely to suffer from separation anxiety.
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1. Australian Shepherd
Another active working breed, a lack of activity and company tends to make the Australian Shepherd bored and anxious. Interestingly, they don't come from Down Under - but rather the USA. | Getty Images
2. Affenpinscher
No, it's not a small monkey - it's an Affenpincher! It's another small breed that can suffer from separation anxiety. The Affenpinscher simply loves its owner so much that it hates to see them go. Leave them alone for long and you may well come home to a mess on the carpet as stress takes over. | AFP via Getty Images
3. Border Collie
The Border Collie is one of the most active breeds of dog - bred to be out and about with their master herding sheep. Their high energy levels and intelligence mean they need a huge amount of stimulation and regular lack of company will lead to separation anxiety very quickly. | AFP via Getty Images
4. Bichon Frise
The Bichon Frise has been bred to be the perfect lap dog, which means that it can feel anxious and abandoned if it doesn't have a lap to curl up on at all times. Separation anxiety can be a very real problem with this adorably and fluffy breed. | AFP via Getty Images