Spray the crock pot with nonstick cooking spray and add chicken breasts.
In a bowl combine the soy sauce, teriyaki sauce, and pineapple chunks (with half of the juice) and pour over the chicken.
Sprinkle with red pepper flakes on top as desired.
Cook on high for 4-5 hours.
Shred chicken with two forks in the crock pot.
Serve over rice.
Notes
We love to serve this over rice (white rice, brown rice, and jasmine rice) or even cauliflower rice.To turn this into a freezer meal:Add all ingredients to a gallon-sized freezer bag. Squeeze out as much air as possible and seal bag closed. Place freezer bag into freezer and it will last 60-90 days. When ready to use, spray slow cooker with non-stick cooking spray and dump ingredients from bag into slow cooker. Place the lid on top and cook on LOW heat for 5-6 hours or until chicken is completely cooked through (some slow cookers may take up to 7 hours). Follow the rest of the instructions as written.