SAN FRANCISCO (KRON) -- Eggs are a hot commodity at Bay Area grocery stores right now. You may have noticed empty shelves when you’re out doing your shopping. KRON4 spoke with farmers and industry experts about what’s causing the apparent shortage. Bird flu has been wreaking havoc on poultry farms and Northern California is no exception. If eggs are still on the shelves at your local grocery store, shoppers will likely notice higher prices. Empty shelves in the egg section have become a common sight in the grocery store. On Tuesday, a sign that said “Chickens on Strike” was put up at a Trader Joe's in San Jose. Google discriminates against employees who take family leave, lawsuit alleges Shelves were re-stolked at a Safeway in San Francisco Wednesday, but there was still a notice to shoppers limiting them to two egg products each, due to a limited egg supply. Last winter, Sunrise Farms in Petaluma had to euthanize more than 80,000 chickens because of bird flu. This week, the owners confirmed to KRON4 that the flu is back and causing the egg shortage this year. “Getting really hard to find eggs at all,” said Brittany Morse, assistant director of animal care at the nonprofit Wildcare, which recently sent a group of dead birds to the California Department of Fish and Wildlife for testing. “One hundred percent of them came back positive for bird flu and we just sent another group of cadavers in yesterday and that was three times as many bodies, so unfortunately we’re seeing the symptoms that we suspect would be bird flu,” Morse said. Morse said the bird flu is usually spread from wild birds during their migration. The bird flu outbreak began in February 2022 and has led to the slaughter of more than 111 million birds, mostly egg-laying chickens. If one case slips into a farm, owners are left making a difficult decision for even the healthiest birds. “If they get one positive, they have to euthanize everybody because they have no idea how much it spread and it’s so aggressive that they have to assume every single bird they have could potentially have bird flu,” said Morse. The Food Industry Association put out a national report today saying that the bird flu has caused egg prices to increase 8.2%.