There are not currently genetically modified chickens or eggs on the market. While chickens and eggs themselves are not genetically modified, most chickens in North America are raised on a combination of corn, alfalfa, soy, and canola. All of these crops are very likely to come from GMOs. The majority of genetically engineered crop acres in the United States are used for animal feed and the Non-GMO Project seal requires the ongoing GMO testing of feed at the farms. Avoiding products of animals raised on GMO feed is a way to reduce GMO use and contamination.