FYI - these are not Siberian tigers. Siberian tigers are black and orange, like all other tigers in the wild. White tigers all come from a single genetic anomoly that has been inbred hundreds of times in order to get that white coat. NO accredited zoo will have them because they are a product of a sick practice that the world ignorantly buys into. Why did the mother abandon its cubs? Probably because, like most white tigers, the mother was born with mental retardations and was unable to care for her offspring. Do your research if you don’t believe me.