Rats are almost universally despised in the modern world. Their reputation as disease-laden scavengers seems to precede them wherever they go. Some people own rats as pets and will, of course, perceive them differently.
For most people, dreams of rats reveal concerns of becoming destitute scavengers themselves-friendless and outcast. Another potential scenario is that the dreamer feels his or her social security is being gnawed away. In contrast to theft, when all is quickly and dramatically taken, the rats gradually erode their environment.
In your waking life, do you view rats as potential pets or potential predators?
In your dream, are the rats a serious threat to your health or possessions, or are they merely an uncomfortable presence?