What you need:
the bones from your Roast Chicken
couple of carrots, peeled
half an onion, chopped
salt and pepper to taste
and I thru in a couple of dashes of dried Italian seasoning
8 cups of water
Set to boil in a stock pot. Once it has come to a rolling boil, reduce heat to a simmer for about 4 hours. Add water as needed and all done!