NEW YORK — Chobani is pulling some of its Greek yogurt from supermarket shelves after hearing of “swelling or bloating” in cups.Chobani says it has been working with retailers to remove containers with the code 16-012 and expiration dates Sept. 11 to Oct. 7. The company did not say how many of its cups or what varieties were affected. It was unclear if the cups at issue were produced in its New York factory or its production facility in Twin Falls, Idaho.It said it was not issuing a formal recall of the products.The New Berlin, N.Y.-based company also would not say what caused the problem, but said it believes it has addressed the issue.A representative for Kroger, the nation’s largest traditional supermarket operator, said Chobani issued a product withdrawal Friday. “It was not a food safety issue,” Kroger spokesman Keith Dailey said in an email.On Tuesday, Chobani was responding to people who were complaining about their yogurt cups on Twitter. One person described her cup as “unnervingly fizzy,” another said the cups were like “yogurt soup” and another said it tasted like “wine.”Yet another person said the strawberry yogurt they bought tasted “really old.”Chobani, which says it uses only high-quality, natural ingredients, has grown rapidly since it was founded in 2005.