Most vegetables are rich in vitamins A and C, potassium and fiber. Some vegetables provide appreciable amounts of B-complex vitamins, calcium, magnesium, iron, protein and carbohydrates. If vegetables are exposed to heat they generally lose much of their nutritional value. Vegetables that have been shipped a long distance and have been in a store on display for several days may be of less nutritional value than frozen vegetables. Canned vegetables are lower in nutritional value than fresh or frozen because they have been heated to high temperatures.
Canned vegetables are also usually high in sodium.
Herbs provide not only a source of nutrition by the vitamins and minerals they contain, but can also provide medicinal properties. If herbs are served regularly, their properties can offer your bird a lifetime of better health. Certain herbs should be used only with the guidance of a health professional, but some herbs, such as the ones listed above can be added to a diet of a variety of other fresh foods for the nutritional value they possess. Whole grains are excellent sources of protein, carbohydrates, unsaturated fatty acids, B-complex vitamins, vitamin E, iron, zinc, magnesium, and fiber. Grains that have been refined, are far less nutritious with many nutrients removed and very few added back.