text:  The FDA says a pasteurization approach widely used in the dairy industry has proven to be effective in killing bird flu and milk. After questions were raised in an earlier study, bird flu is contributing to an egg shortage in Australia. Here's reporter Scott Maimon. The outbreak of bird flu H7N8 strain has led to chickens being destroyed at a variety of properties. Farmers Federation spokesman Xavier Martin, he says while chickens are being culled... There's still plenty of supply.