Papa Murphy's Holdings Inc. said Monday it is planning to serve chicken raised without antibiotics across its entire menu starting today. The company has more than 1,500 stores across the U.S. The company is joining a growing list of food providers that are switching to offering food that is free of antibiotics, as well as artificial colorings and preservatives. Shares were not yet active in premarket trade, but are down 36% in the year so far, while the S&P 500 has gained about 6%.
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