Whole Foods said Thursday that labels on a chicken salad and on a vegan version of the salad were mixed up at some of its stores in the Northeast — but some strict vegetarians are frustrated by its response. The mislabeled salads — a curried chicken salad and a vegan curried "chick'n" salad — were sold in 15 stores in Connecticut, Maine, Massachusetts, New Jersey and New York on Tuesday and Wednesday, Whole Foods said. According to the Food and Drug Administration, the vegan salad contains soy, and the curried chicken salad contains eggs — foods that can trigger life-threatening reactions in people with allergies or severe sensiticities, according to the FDA. The Austin, Texas- based company said no illnesses had been reported, but some customers were frustrated that vegans and vegetarians weren't considered in that response. "We apologize to any customers who may have unknowingly eaten food that is outside of the typical diet," a spokeswoman told TODAY.com.