Place chicken into crock pot. Sprinkle Ranch seasoning over chicken along with mustard, honey, chicken broth and thyme. Stir with spoon, cover lid and let cook on low for 6-8 hours or on high for 4-5 hours.
Remove chicken from crock pot and strain broth through a fine sieve to remove fats. Place chicken and broth back into crock pot. Add 2 more tablespoons of mustard and 2 more tablespoons of honey. Stir and season with salt and pepper to taste.