Add to Slow Cooker: Place all ingredients into the slow cooker, except for 1/2 cup of the Greek yogurt.
Cook: Cover and cook on low for 8 hours or high for 4 hours until the chicken is tender and easy to shred.
Shred & Stir: Shred the chicken directly in the slow cooker and stir in the remaining 1/2 cup of Greek yogurt.
Serve: Spoon over rigatoni, another pasta of your choice, or rice.