correspondent, elizabeth cohen, joins me now. and ew. >> different but not in a good way, right? right, exactly. when you hear mold, you think, wow, people must be getting sick. in this case, this isn't a health concern, but it certainly made for an unappetizing breakfast. fizzy. old, not the appetizing adjectives yogurt aficionados look for in their breakfast on. twitter this week, several consumers were voicing their complaints. openly worrying about eating chobani greek-style yogurt. the strawberry tasted really old. "my vanilla yogurt tastes like wine. is this bad?" "if the foil top is puffed up and the yogurt tastes fizzy, does that mean it's spoiled?" >> stir it up, and raise a cup. >> reporter: what was causing certain cups of yogurt to swell and bloat and taste so bad? after an investigation, the chobani company says it was mold. and it's now pulling potentially