To hear barking in your dream suggests that you are annoying those around you with grumpiness and fussiness. The dream may also be analogous to your tendency of barking orders at people, instead of asking or talking kindly. Alternatively, barking refers to unhappy and disgruntled companions.
Dreaming of the bark of a tree refers to your thick-skinned nature. If you dream of clothing that is made of tree bark, then it indicates that you are putting up a protective barrier. You are not letting others get too close. Alternatively, the dream may mean that you are one with nature.