Newsround interviewed vet Tricia Mundy from the Village Animal Hospital in Surrey, who gave us some top tips for avoiding dangerous dogs.

Here's what you should do if you fear a dog might be about to attack you.

Stand still

Stay calm

Face the dog

Fold your arms

Walk away calmly, facing the dog, but without making eye contact

And remember, if a dog attacks a human, it's usually not because it is trying to "hunt".

Tricia said it's often because the animal feels frightened, so dogs are usually more scared of us than we are of them.