It isn't fierce. It's frightened.

When people see a stray dog, many instinctively run, shout or freeze. But a dog barking at you isn't necessarily trying to hurt you. Quite likely, it's more afraid of you.

Next time you meet one

• Slow down. Don't suddenly run away or towards it.
• Stay quiet. No shouting, no waving it off.
• Give it space. Keep your distance so you can both move on calmly.

That defensive stance is just a dog trying to protect itself. Living on the street doesn't make a dog dangerous, and understanding works better than fear.