cheese into the rest of the mix. cover and continue cooking the last hour (if you forget this step, it won't hurt anything to mix it at the end).
after the 6 hours, remove the chicken breasts into a medium bowl and shred with two forks. chicken should be fall-apart tender. place the chicken back into the slow cooker and stir to combine.
serve over baked potatoes topped with cheese and sour cream. it's also great with tortilla chips or white rice. 