Place the chicken in slow cooker. (For this amount of chicken, a 6-quart cooker is recommended. Feel free to adjust the recipe down to accommodate a smaller model.) Sprinkle the spices overtop, and then pour the chicken broth over all. Cover and cook for 4-5 hours on low or 2-3 hours on high. (Newer slow cookers will typically cook on the shorter side; check a little early until you know how long it takes in your cooker. Chicken should shred easily and have an internal temperature of 165 degrees F.)