The D3 is necessary if direct sun is not available, such as behind glass windows. Livestock salt with trace elements such as iodine, cobalt, manganese, etc. is also useful. This extra mineral supplement is especially necessary if the doves are raising young. Deep green leaves are often desired by the doves, such asdandelion leaves, but they are not necessary if pellets are given. Be sure that the leaves have not had herbicide sprayed on.
Doves drink water like pigeons in a continuous draught.
One big drink perday is minimal, but morning and evening drinks or at liberty is much better. These doves like warm dry climate. Their original homeland was North Africa, Somalia, and Arabia. They are not migratory. With plenty of food they will breed most of the year.