Hint, the longer this cooks, the more likely your rice is going to eat up all the liquid. If you find your soup thick, you can add water to it until it reaches the consistency you'd like to see. Also, if you use white rice, it will be mush. If you plan to cook the rice in the slow cooker, you'll need a tougher grain, like brown rice. If you prefer white rice, cook it separately and add it towards the end of its cooking time.