Your best bet would be to bring the baby dove to your local animal rehabilitation or something. I volunteer at one in my area, and when they get doves that are babies, they provide seeds and water to wean them (weaning is when they eat on their own), and they have some special milk-formula stuff they feed the baby doves, but I was in a position where I had to try and raise a baby dove, and the wildlife rehabilitation centre people said I would be fine to syringe feed baby bird formula (that you can get at some pet stores) to the dove (it's the same formula I use for my baby budgies). You just need to mix the powdered formula with warm water (or hot water, because it will cool quite soon) until you have a gravy-like consistencey... Maybe a bit thicker. You want the formula to be warmer than your skin (for budgies it's around 105 degrees Fahrenheit) and just feed it to the dove (pointing the tip of the syringe towards their right side of the mouth (our left) just put the tip of the syringe in on their left side) if the dove doesn't open its mouth, you can hold it open and feed it.
But like I said, you should try and get the dove to an wildlife rehab centre. You should only feed the dove yourself if there isn't one. Hope that helps!
