Some Mourning Doves made a nest on a shelf in the gazebo in my backyard a week or two ago. Today I went out there and the mom and the two babies were on the ground. My dog killed one of the babies and the other I put back in the nest. The one that my dog killed was trying to fly away, so I assume they were on the ground because they were learning to fly. I am pretty sure that the baby that is still alive can't fly. The one that died was a little bit bigger than this one. The mom dove still hasn't come back and its almost dark. I don't want this baby to die too, because I don't think it will make it through the night without warmth. It does have feathers though. What should I do?