This is both horrific and fascinating:

A Mowgli-like wild boy who appears to have been raised by a dog since he was three months old has been discovered living in a remote part of Siberia seven years after he was abandoned by his parents.

Andrei Tolstyk, now seven, was found by social workers who wondered why the boy had not enrolled at his local school in the beautiful Siberian region of Altai.

Deprived of human contact for so long, Andrei could not talk and had adopted many dog-like traits including walking on all fours, biting people, sniffing his food before he ate it and general feral behaviour.

The article goes on to say that he has since learned to walk upright, eat with a spoon and make his bed. Pretty amazing if you consider that he had not human contact through his early formative years.