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 - Turtledove
If you are single and see turtledoves then expect success in your love life. If you are married then you will have a happy home, but if the turtledoves are in a cage then you will be disappointed because your personal hopes will not be fulfilled.