Vision: A barking dog is a warning: don’t take unnecessary risks. Several dogs are barking: people around you are up to no good. Several dogs are barking at you: think first—then act—and keep calm. See Dog.... Dreamers Dictionary
To hear barking in your dream suggests that you have a tendency of barking orders at people instead of asking or talking kindly. It may also indicate that you are annoying others, or acting overly grumpy.
If you see a happily barking dog in your dream, this symbolizes pleasures and much social activity.
If the dog is barking ferociously, then it represents your habit of unnecessary complaining about people and the situations around you. It could also mean unfriendly companions.... My Dream Interpretation