If you put bread by the doves egg with the mom think it has human touch?

You should never put anything in a bird's nest, or disturb it in any way (including touching the nest)! Everything you touch has your scent on it. the bread will be somewhat useless to the dove in/owning the nest because it will probable smell you and abandon the nest. Your best bet is to leave the bread somewhere nearby-perhaps near the ground or somewhere at least 5 feet away from the nest. Remember, a bird will abandon a nest even if you startle her!