What are the signs a dog might not be safe to approach?

You might have heard about a rise in the number of reported dog attacks in recent months.

The Prime Minister has said he will add the XL Bully to the list of dangerous breeds after they were found to be involved in a number of cases where people were injured.

But campaigners say the breed is not generally dangerous and the focus should be on improving awareness and sharing more education about breeding.

Newsround went to meet vet James Greenwood and his Labrador Dolly to ask his advice about how to recognise the signs that a dog might be unsafe to approach.