Dog Is Surrogate Mom to Abandoned Siberian Tiger

A newborn Siberian tiger living at a zoo in Qingdao, China, was all alone in the world when it was abandoned by its mother – and that's when the maternal instincts of a very special dog kicked in.

Now the pooch is acting as its mother, nursing it and treating the feline just as she does her own pup – who appears to have bonded with his sibling-in-spirit.

Siberian tigers typically stay with their mother for the first two years of life, at which point this little guy won't be so little anymore. An adult Siberian weighs about 400 lbs.!