Trader Joe’s and other grocers are limiting the number of eggs customers can buy across the U.S., citing limited supply caused by the ongoing bird flu outbreak. Trader Joe’s is capping purchases to one carton per customer each day nationwide. Consumers and several local media outlets have also reported varying limits seen at stores like Costco, Whole Foods, Kroger and Aldi locations — with photos of in-store notices swirling around online in recent weeks. But not all are being implemented nationally. Kroger, for example, says it doesn’t currently have “enterprise-wide limits” in place — but said some of regional divisions and store banners are asking customers to cap egg purchases to two dozen per trip.