Place the chicken bones or carcass in the slow cooker.
Add the onion, carrots, celery and garlic.
2 ½ to 3 pounds chicken bones or carcass, 1 onion, 2 carrots, 2 celery stalks
Pour in the apple cider vinegar and water.
2 cloves garlic, 1 tablespoon apple cider vinegar
Add the salt and black pepper.
8 to 10 cups water, 1 teaspoon salt
Cover and cook on low for 12 to 18 hours.
Strain the stock through a fine sieve and discard the solids.
Allow the stock to cool slightly before storing.
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