Quite simply, a wild animal's chances of survival are greatly increased when left in its natural environment. If the parent does not return within 1 or 2 hours to the baby on the ground, and you decide to take responsibility for the young animal, it is important to get it to a licensed wildlife rehabilitator as soon as possible. Keep it in a warm, dark and quiet place where they can't move around much, such as a small box and don't attempt to feed it. The mother will visit the nest within 12 hours. Mothers do not reclaim babies that are not in the nest.
Rabbits leave the nest and become self-sufficient at a very young age.
Rabbits rarely survive captivity, and if uninjured, should be released immediately. DEER Young fawns easily imprint on humans which can be dangerous for both the deer and humans. Fawns must be reunited with the mother or raised in a rehabilitation center that can rear them correctly for release. The mothers will leave their young alone and feed elsewhere, so that predators will not be attracted to the helpless fawn. She will only come back to nurse twice during the day.