Aggressive Dogs 2025: The 13 breeds of dog most likely to show aggression

We’re officially a nations of dog owners, with the UK’s most popular pet living in around one-in-three households (and rising).

That means that there are around three million pooches living here, with more people choosing to join the army of dog lovers every week.

Of course, if you are looking to welcome a dog into your family, there are 221 different breeds of pedigree dog to choose from, alongside numerous crossbreeds, so there’s plenty of thinking to do before you select your family’s latest addition.

There’s even academic guidance to seek out, with Psychologist Stanley Coren’s book ‘The Intelligence of Dogs’ ranking breeds by instincts, obedience, and the ability to adapt.

Choosing the right breed is absolutely essential – for example opting for a small dog if you don’t have much room at home, or a hypoallergenic dog if you suffer from allergies.

Before they were domesticated, dogs had to fight for everything from food to territory – so signs of aggression were essential to their survival.

Many of these has been bred out to create the perfect family dogs we know today, but some breeds are more likely to retain an aggressive side than others.

There can be good reason for this – for example for those used as service or guard dogs – but prospective owners should be aware that this is the case before choosing to welcome a certain dog into their homes.

It should also be said that individual dogs may display attributes that are unusual for their breed, and all dogs have the potential to be aggressive in certain situations.

Here are the 13 breeds most likely to show signs of aggression – including growling and snapping.