Add all the ingredients in a slow cooker and stir to combine.
Cook on high for 3-4 hours or low for 5-6 hours or until chicken is cooked through. Use two forks to shred the chicken. Serve hot with desired toppings.
Notes from the Chef: "I like using Rotel brand tomatoes with green chilies. I also used chicken breasts that were already cooked; the pulled chicken you find in the deli would be great. I also added an 8 oz. block of cream cheese. Using this method, the soup takes about a half hour. Put all the ingredients in the pot and simmer, stirring occasionally, until warmed through."