A 17-year-old Siberian tiger gave birth to quadruplets recently at the China Hengdaohezi Feline Breeding Center in northeast China's Heilongjiang Province. Three female tiger cubs and one male were born. During her pregnancy, breeders fed the tiger 20 eggs and half a kilogram of ewes' milk every day. The center monitors the cubs around the clock, and breeders measure each one's weight daily.