In the world of dreams the rules of reality do not necessarily apply. Each dream is unique and it's a direct link to the soul and spirit. Psychology provides its own theories on what dreams mean, but so did tradition and the study of dreams for thousands of years before any relevant science had developed.
Dream Meanings - Hunt-hunter
If you dream that you are a hunter and kill many birds then you will enjoy progress and profits at work. If, however, you catch nothing then you will have failure and worries in your job.