Place chicken in a slow cooker. A 4 to 6-quart slow cooker works fine.
Sprinkle ranch and Au Jus on top of chicken.
Add the pepperoncini juice and peppers.
Cover and cook on LOW for 5 to 6 hours.
Cut cream cheese into pieces and add to crock pot. Place lid back on for 5 minutes.
Shred chicken with 2 forks and stir to mix the cream cheese in.
Notes
Boneless, skinless chicken thigh meat can be used instead of chicken breasts, but will need to be cooked a little longer.This is a salty dish. If you don't like salty foods, try to find a low sodium Ranch seasoning or make a homemade one. Or you can try adding only 1/2 a packet of Ranch seasoning.