Fear is an emotion that is triggered by a perceived threat.
Dogs have a much stronger sense of smell than humans. They have about 300 million olfactory receptors in their noses, compared to our 6 million.
There is some evidence to suggest that dogs can smell fear.
Not all dogs are equally good at smelling fear. Some breeds, such as bloodhounds and Labrador retrievers, are better at it than others.
It is not fully understood why dogs smell fear. However, it is thought that they may do it to assess the threat level of a situation or to protect themselves from danger.
If you are afraid of dogs, it is important to be aware of your body language and to avoid making any sudden movements.