They contain nutrients that are required for optimum health. Dry seeds do not contain vitamin C, however if they are sprouted they are a rich source of this nutrient. Of course, you're bird won't learn to read, and I don't believe Bird Talk is running a contest for a healthy bird award, but your bird will mostly likely be resistant to infection and disease and live a longer life due to its receiving a well-balanced healthy avian diet. A. Follicular or feather sheath hyperkeratosis, dry skin, sinusitis, and many other types of infection. Skin and feather disorders are commonly seen in those birds with a vitamin A deficiency.
Infections are more likely to occur as well.
Those foods rich in calcium and magnesium and the B complex vitamins, such as greens, whole grains, legumes, some nuts and seeds. Greens, whole grains, legumes, and certain seeds and nuts are excellent sources of those nutrients that help to relieve stress. Those foods containing a high level of sugar, such as pastries and some cereals, are unhealthy for our birds, and can promote nervousness and anxiety. Dehydrated fruits are sugar-concentrated and should be fed on a very limited basis. Your bird is overweight.