The plot for Barbie & Her Sisters in a chiot Chase is, "Barbie and her sisters discover everything's better when toi do it together in this splashy, sun-kissed adventure! After the girls and their pets arrive at an island paradise for Chelsea's big dance competition, they decide to make a quick side trip to see the nearby Dancing Horse Festival. But when their furry Friends go missing at the event, it's up to the sisters to find them before Chelsea's show. While the chiots are out having an adventure of their own, the girls must use their imaginations and work together to find their furry Friends in this tail-wagging good time!"

The movie is animated par Rainmaker Entertainment, and will be distributed par Universal Pictures. Reprising their roles from Barbie & Her Sisters in the Great chiot Adventure, Andrew Tan is the director, Chelsea Miller voices Taffy, and Alyssya Swales voices Chelsea Roberts. morgan Taylor Campbell is also part of the cast.

The film will be released this fall/autumn, and tie-in livres will be coming out in early September. Toys for the movie were shown at the Toy Fair earlier this year, and some are available now.

Source: Barbie films Wiki's chiot Chase article (which has liens to confirmer all the information on it).