According to the latest data from the USDA, the number of birds affected by cases spiked over the last three months. That change is creating a shortage of chickens, and a lack of eggs as a result.

It's not just bird flu that's causing egg prices to soar. Here's why they've gotten so expensive — and are likely to stay sky ...

More than 8 million birds have died from this in January nationwide, which retailers say has led to a supply chain shortage, and higher prices.