Place bones (2-4 pounds), water (4-6 quarts), salt (1 tbsp), apple cider vinegar (2 tbsp) and vegetables into either an Instant Pot, slow cooker or stovetop pot.
If using the Instant Pot set to the Soup/Broth function for 4 hours. Allow a natural release when time is finished. If using the slow cooker or stovetop pot, simmer on low temp for 12-24 hours.
Once the cook time has finished, allow the broth to cool for 1-2 hours. Then strain into a large bowl or pot and ladle into jars or another airtight container. Store in the fridge.