Place the cover on the slow cooker and cook on HIGH for 4 hours or on LOW for 6-8 hours. Carve and serve chicken or shred it for use in another chicken meal. Use the bones and drippings to make homemade chicken stock in the slow cooker.1  Rinse the thawed chicken and pat dry.2  Place the chicken in the slow cooker.lace the cover on the slow cooker and turn it on to high for 4 hours or low for 6 to 8 hours. You do not need to add any liquid. Chickens today typically have some solution added, so they rarely need added liquid. At the end of the cooking time, the meat will be tender, practically falling off the bone.