Cover with water and boil chicken, bones and/or turkey necks in a 10-quart soup pot. Clean the fat from soup according to the instructions below.
Place the chicken/bones/necks and prepared vegetables, except for the zucchini and potatoes, in the pot. Add herbs and spices and cover with cold water plus 3 cups. Bring to a boil. Cook covered over medium-low heat for about 2 hours. Add the zucchini and potatoes in the last hour of cooking.
Tips on removing the fat: When preparing chicken soup or some poultry/meat dishes, it's important to clean away the fat and lighten them up. Here are several methods for doing this.
Boil cleaned chicken, meat and/or bones. When you see a brown and white foam come to the top, spill off the water into the sink. Rinse both the pot and the chicken, meat or bones well. Proceed with recipe instructions. Or, carefully spoon out the foam after the water comes to a high boil.
Place a slice of dry bread in cheesecloth and float it on top toward the end of cooking. Discard when the fat is soaked up.
Float a lettuce leaf on top toward the end of cooking, discarding it when done.
To make a totally fat-free soup, prepare a day in advance and refrigerate. The fat will congeal on top for easy removal.