After you remove the meat from the chicken, place the carcass or leftover bones back into the slow-cooker.
Add in the onion, carrot, celery, and spices. Then fill the crock pot with water until itβs about 3/4 full.
Set on low for 10 hours, or high for 5 hours. Once the stock is done, you can season it with salt if you wish. Let the stock cool for about 20-30 minutes.
Then strain, and discard the vegetables, spices and bones. Refrigerate or freeze the stock in portions of 1 or 2 cups.