Add 1/2 cup vinegar & 1 tblsp.salt per
gallon of water added. Let sit approx. 30 min.
Then bring to boil & cook on lowest "simmer"
setting for 2 - 3 days.
Remove broth, & add fresh water, vinegar, & salt, (as ratio above) & more chicken bones,
heads, & feet.
Simmer for another 2 days.
Remove again, & repeat process 1 more time; adding fresh
chicken bones, etc.
We usually do not remove the fat unless in excess. And then we
save it for future baking or frying, using it in place of oil.