Seeds are not enough!
For years veterinarians have recommended supplementing birds eating seeds only because seeds alone do not provide adequate amounts of all the nutrients needed
Why? Seeds lack 21 nutrients from four groups-Vitamins, Minerals (calcium and sodium) Trace Minerals (iron, copper, zinc, manganese, iodine, selenium) and protein.
Many times we have advocated adding vegetables-which do add some vitamin A and some calcium, but little protein, minerals trace minerals and vitamins- and fruits which offer some vitamin A but none of the other missing components.