The breeder will find it necessary to prepare a mix in quantity. It is useful to dice and mix this to make it less easy for birds to pick out their favorites. Only allow these foods before your birds for a few hours at a time. These foods are all perishable, particularly the the eggs. Chlorinated tap water is fine.
Spring water is even better.
Never place antibiotics or other medications in the water unless prescribed by a veterinarian. Alcoholic beverages, coffee, tea, or soda should not be given to birds. Birds will often not drink fruit juice.