Add the carrots and sliced onions to the slow cooker.
Remove the chicken from it's packaging, remove in items from its center and discard, drain off any juices. Add to the slow cooker on top of the carrots and onions.
Spread over the mayonnaise.
Sprinkle over the salt, pepper, garlic powder, paprika and parsley.
Cook on low for 7-8 hours. The chicken should fall away from the bone or read 165° on a thermometer.
Serve the chicken with the carrots and onion and another side dish if desired. Enjoy!
Notes
Add any remaining chicken, onion, and carrots to an airtight container and store in the fridge for up to 4 days.
Miracle whip or greek yogurt can be used instead of mayonnaise if desired.