While the white or golden tabby coloration of these animals may be pretty, what the zoos won't tell you is that, in reality, it's a deadly genetic mutation. THEY ARE NOT A SUBSPECIES, and are not albino. The white gene is a double-recessive one caused mostly by inbreeding (in a natural mating, there is only a one in 10,000 chance that a tiger will be white), which is why they say that it exists 'only in captivity'. Zoos are not willing to wait for this one in 10,000 miracle tiger, and so find that the inbreeding is only other way to produce them. This inbreeding causes more than 80% of the resulting offspring to suffer mental and physical ailments such as cleft palates, curved spines, bone deformation, mental retardation, and clubbed feet.