Baby rabbits, also called kittens, can leave their mothers when they are fully weaned, which is about 6 to 8 weeks old. Cottontail rabbit mothers, however, only wean their kittens from 3 to 4 weeks, allowing their young to leave the nest and survive on their own.
Baby rabbits are born furless and with their eyes closed. The mother rabbit nurses the kittens and leaves the nest to forage for food. It is not unusual to find baby rabbits alone in a nest of straw, twigs and fur, as the mother often comes back at night to wean. Cottontail rabbits grow fur faster than other types of rabbits and are able to open their eyes in 10 days. They come back to their nest to sleep and often stay there until they are 4 to 5 weeks of age.