A vet has shared the five dog breeds he wouldn’t want to own based on his professional experience - and some are very popular choices. All over the world , millions of people have welcomed a dog into their hearts and homes, earning them the title of “man’s best friend”. It can be tricky to know which breed to choose , with many prospective owners turning to social media looking for tips and advice to help them determine which dog personality traits and habits are most suited to their lifestyle.