Add skin and bones from a whole chicken to a seven quart slow-cooker. If you used my recipe for Slow-Cooker Whole Chicken, be sure to use all the aromatics and herbs, too. If not, add in fresh vegetables and herbs.
Add enough water to the slow-cooker to fill about 3 inches from the top. Cover and cook on low for 12 hours.
Strain bone broth and place in a storage container. Keep in refrigerator for a week or freeze in freezer safe containers. To easily removed fat, chill and spoon off the fat.