"Yogurt is an incredibly competitive space in the grocery store," Morningstar senior equity analyst Erin Lash told ABC News.
"It will take a few more quarters to judge if the growth is sustainable," Lash said.
Yoplait was introduced in the U.S. in the early 1970s. In 1977, Yoplait had 14 flavors. Today, there are more than 270 types of products, or SKUs, not just flavors, including Yoplait original, light, Greek, whip and children's yogurt.
In what may be an effort to stem the tide, General Mills is introducing next month a new Yoplait product, "Greek 100 Whips," taking strained Greek yogurt and whipping it into a yogurt "mousse."
"We are really excited to bring Greek 100 Whips! to market for the many consumers who want the benefits of Greek yogurt, like protein, but don’t necessarily love the texture or the taste," Joanna Hargus, new products marketing manager for Yoplait, told ABC News.
The eight flavors of the new line have been in development for about a year, but the company decided to fast-track it earlier this spring when General Mills tested the product and "knew this would be a big hit," Hargus said.
Meanwhile, cereal consumption remains in decline, given the vast number of options consumers have for breakfast, Lash notes.
As Lash noted in her research note last month, "the onus is on General Mills and its category peers to tout the benefits of cereal not just at breakfast but throughout the day."
In touting the benefits of Greek 100 Whips, Hargus said, "Some consumers have referred to Greek 100 Whips! as 'bringing the trifecta' of protein, 100 calories and whipped texture that they love."