Hangzhou, China, September 24, 2008-- A baby lion that was regularly fed the tainted milk at the center of China's most recent food scare is examined for kidney stones.

Melamine, a chemical used to make plastics and fertilizer, has been found in infant formula and other milk products from 22 Chinese dairy companies, the Associated Press reported Tuesday. The chemical masks protein deficiency in watered-down milk.

More than 54,000 infants have been sickened by the tainted milk, four died.