If the mother refuses to feed him, could be that the baby is not healthy...sounds mean but that is just their nature, give them sometime and see what happens. If you touch the baby she will smell like you and the mom will just kill him. when I was a kid we had rabbits and the very last time our female gave birth most of the babies were sick and she threw them out of the nest and killed a couple too.
if you touch the baby, rub your hands on their food before doing so, to make sure your smell is not left on him.
Dogs don't need to talk, their life is their message ~ unknown.
"The greatness of a nation and its moral progress can be judged by the way its animals are treated." ~ Mahatma Gandhi