Add the bones and optional chicken feet to the crock of a slow cooker. These can be frozen or fresh.
Add in the salt, ACV, smashed garlic, and whole black peppercorns.
Cover everything with filtered water, until all the ingredients are fully submerged.
Set to low and cook for 24 hours.
When there’s about 8 hours left on the cooking time, add the remaining ingredients, and continue to cook.
Allow broth to cool completely.
Using a fine mesh strainer, strain the broth and transfer to your storage containers. I use either glass, or heavy duty BPA free plastic freezer containers.