The Berlin Zoo is putting Knut the polar bear cub on a diet. Knut, whose legendary cuteness has doubled zoo attendance since his debut in March, is now 8 months old and weighs 132 pounds. More than his actual weight, it was his physical appearance that persuaded the staff to make the change, said the zoo?s veterinarian, Andreas Ochs. ?If Knut would live outdoors, this wouldn?t be so bad,? Dr. Ochs said. ?However, in captivity, the bear won?t need to fend off a grim winter.? Knut?s four daily meals will be reduced to three, he added, and ?extras, like croissants, will need to be dropped.?.