Harrison's Guide to Supplementation:
Supplemented vegetables (and fruits that contain low amounts of sugar) should make up about 20% of the overall diet by weight for many species.
Select dark yellow meaty or dark green leafy items such as sweet potatoes, carrots, pumpkin, winter squash, broccoli, parsley, spinach, mango or papaya.

Items rich in Omega 3 fatty acids such as organic flax or chia may make up another 5% by weight (try Harrison's JUMPSTART OMEGA)
Harrison’s Bird Foods should make up the remaining 75% of the daily diet.

It is important to carefully follow supplementation guidelines for Harrison’s to be fully effective.
Over-supplementation of any other foods may result in dilution of the nutrients provided in Harrison's Bird Foods formulas.

Do not add additional vitamins, minerals or other bird or animal food products to birds fed Harrison’s or other formulated diets without consulting your veterinarian first.

For bird species susceptible to iron-storage disease (such as toucans and mynahs, etc.) :
Avoid citrus fruits, tomatoes, kiwi, strawberries and other foods containing vitamin C. Avoid grapes, currants, raisins, liver, red meat, egg yolk or dark green vegetables such as spinach, which may contain high levels of iron.

For breeding birds:
Birds should be fed High Potency Formula 1-2 months prior to the breeding period and until chicks are weaned or for at least six months before resuming Adult Lifetime Formula.
The amount of supplemental certified organic vegetables and fruits may be increased until the chicks are weaned.