I saw this in Chinese News today. This girl was barking like a dog, hanging her tongue out to pant, walked on her hands and knees, and acted like a dog:
Oxana Malaya (Оксана Малая) (born November 1983) was found as an 8-year-old feral child in Ukraine in 1991, having lived most of her life in the company of dogs. She picked up a number of dog-like habits and found it difficult to master language. Oxana’s alcoholic parents were unable to care for her. They lived in an impoverished area where there were wild dogs roaming the streets. She lived in a dog kennel behind her house where she was cared for by dogs and learned their behaviours and mannerisms. She growled, barked and crouched like a wild dog, sniffed at her food before she ate it, and was found to have acquired extremely acute senses of hearing, smell, and sight.
http://listverse.com/2008/03/07/10-modern-cases-of-feral-children/inb4oldnewsisold