I know more about pigeons, but I can be of some help.
What species of dove are they? Care may be a little different depending on the species.
Doves are typically seed eaters.Unlike most pet birds (parrots, finches, parakeets, etc.), doves do not husk the seeds before eating them. They swallow the seeds whole. This is a plus for dove keepers since their is no question about the amount of food in a dish where with other birds the seed cups quickly fill up with husks making it harder to determine the amount of seed.
The type of seeds eaten by doves largely depends on the species. While it is true that most doves will do quite well with an ordinary wild bird seed or canary mix from the garden or pet store, most breeders prefer to make their own combinations from various types of seeds. can be fed finch mix, cockatiel mix, wild bird seed, and semisoft dog food (such as Ken-L-Rations Moist and Beefy).
Doves are very sensitive to the elements. While some doves are quite hardy, it is still very important to offer them shelter from wind and moisture. Many doves will also require heat in the Winter months.
A large aviary is the ideal situation for keeping all doves. Doves are avid and swift flyers and need plenty of room for exercise.
Doves can live a long time if cared for right.In the wild, life-spans are short -3 to 5 years. In captivity doves can live to be 12 to 15 years old. It is not uncommon to hear of some doves living beyond 20 years