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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9. Havanese
Much like the Bichon Frise, the Havanese is breed created to be a lapdog and desire human companionship above all else. Leaving this Cuban breed alone for too long is a recipe for disaster. | AFP via Getty Images
10. Jack Russell Terrier
Though they appear bold and confident, Jack Russells need lots of attention and stimulation to rmain happy and healthy. They may become anxious or destructive when bored or separated from their human family for too long. | AFP via Getty Images
11. Italian Greyhound
The diminutive Italian Greyhound requires surprisingly little exercise - a single runaround each day should be plenty - and so can be great pets for those who want a pet that's happy to stay indoors much of the time. Don't presume this makes them pets that can be left for long period though - do so and they are likely to become destructive, noisy and even aggressive. | Getty Images
12. Chihuahua
Chihuahuas are perfect dogs for those living in flats but they really hate being left alone. A Chihuahuas missing human company can become destructive or even aggressive when left behind at home. Luckily you can pretty much carry them with you wherever you go. | Getty Images