Bunnies who are the size of an orange are old enough to be released to the wild. In some cases, you may come across a bunny who is out on his own and/or was brought home by your pet but not injured. In this case if you are sure the bunny is not injured and is the size of an orange, you may consider putting the bunny back in the wild. We suggest that you consult with a wildlife rehabilitator in case the bunny is in shock and needs a day or two to recover. Good places to release bunnies include wooded areas with thickets and downed logs, ideally not very far from a field of greens. As an additional note, you should NEVER consider keeping wild bunnies permanently - they do not make good pets, and they are miserable if kept in a cage - not to mention that it's illegal to keep a wild animal permanently without a permit.