The dream about snake eating rat represents some of your deepest fears, anxieties, and worries. The snake can symbolize fear that lies deep within our subconscious, which is dangerous to our emotional health and well-being. The rat can signify something you feel helpless to control or change. In such situations, the best way to deal with them is by facing them head-on.
Try to understand what the snake and the rat represent in your life and what your feelings are surrounding these notions. Then take some actions to clear these thoughts off your mind. With continuous effort, you will be able to improve your quality of life.