(RNN) - A Chinese family got more than they bargained for when they adopted a pet.
The puppy grew up to be a 250-pound bear.
Not only did the "dog" not stop growing, it developed a talent for walking on two legs.
The family thought the dog was a Tibetan mastiff. Wildlife experts said the creature is really an Asiatic black bear.
"The more he grew, the more like a bear he looked," Yun said.
Once they realized their dog was, in fact, a bear, they called the Yunnan Wildlife Rescue Center, who sedated the bear and took it into their care.
The Asiatic black bear is considered a vulnerable species hunted illegally for its parts, according to the IUCN Red List of Threatened Species.
The case of mistaken identity awed people on Twitter.