The plot for Barbie & Her Sisters in a puppy Chase is, "Barbie and her sisters discover everything's better when u 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 vrienden go missing at the event, it's up to the sisters to find them before Chelsea's show. While the puppies are out having an adventure of their own, the girls must use their imaginations and work together to find their furry vrienden in this tail-wagging good time!"

The movie is animated door Rainmaker Entertainment, and will be distributed door Universal Pictures. Reprising their roles from Barbie & Her Sisters in the Great puppy 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 boeken 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 puppy Chase artikel (which has linken to bevestig all the information on it).