In a well-populated bin, you will need to add an average of one quart of food scraps per square foot of surface area in the bin every week. The actual amount of feed consumed will vary greatly depending on several factors including temperature, moisture, and population density. Worms eat fruit and vegetable scraps, pasta, bread, cooked beans, and other kitchen leftovers.
Worms love coffee grounds and filters, tea bags, paper towels, and napkins.
Eggshells provide calcium and the hard particles help them to digest their food. To avoid fruit flies and odors, always bury the food just below the surface of the bedding. They are attracted to acidic materials in the bin. Put a small jar with about an inch of vinegar or flat beer in the corner of the bin, being careful not to spill it. The flies will land in it and drown.