JOHNSTON, R.I. (WPRI) — Some local grocery stores are implementing purchase limits, only letting shoppers take home two cartons of eggs as farmers grapple with the bird flu. "It's serious business," explained Johnston egg farmer Patti Stamp. "Once it happens, you lose your whole flock ... it's make or break for a farmer." A sign at BJ's Wholesale Club in Middletown sets purchase limits. The Centers for Disease Control (CDC) said more than 10 million birds in commercial and backyard flocks have been hit by the H5 bird flu in the last 30 days. In total, more than 130 million have been affected in all 50 states as of Monday. There were signs limiting customers to two cartons of eggs at ALDI stores in East Providence and Johnston, as well as at the BJ's Wholesale Club in Middletown. While Stop & Shop hasn't implemented purchase limits yet, there are signs informing customers that prices have gone up due to the bird flu. RELATED: First US bird flu death is announced in Louisiana In a statement to 12 News, a spokesperson said in part, "Stop & Shop is seeing supply challenges with eggs as a result of several factors including repeated avian flu outbreaks and increased demand for eggs during the holiday season." Stamp has also noticed the price increase. "Eggs are at an all time high right now," she said. "Jumbo whites are selling for $5.99. I've never sold a dozen of jumbo whites for that price." Eggs are sorted at Stamp Egg Farms in Johnston (Jake Holter/ WPRI-TV) The current strain of bird flue has only been detected twice in Rhode Island, according to the R.I. Department of Environmental Management (DEM). It was first detected in a noncommercial backyard flock in October 2022 and a fox kit in May 2023. The DEM said there has not been a positive commercial poultry case in Rhode Island yet. Like so many other farmers, Stamp is taking extra precautions to keep the virus away from her birds. "We do have a viewing window when all is healthy in America," she noted. "But as soon as that avian influenza threat came out, no one's allowed me near a coop." MORE: Cats can get sick with bird flu. Here’s how to protect them Close Thanks for signing up! Watch for us in your inbox. Subscribe Now Daily Roundup SIGN UP NOW