After a few years, Lasseter and Catmull were able to successfully transfer the basic principles of the Pixar Braintrust to Disney Animation Studio, although meetings of the Disney Story Trust are reportedly "more polite" than those of the Pixar Braintrust. Catmull later explained that after the merger, to maintain the studios' separate identities and cultures (notwithstanding the fact of common ownership and common senior management), he and Lasseter "drew a hard line" that each studio was solely responsible for its own projects and would not be allowed to borrow personnel from or lend tasks out to the other. That rule ensures that each studio maintains "local ownership" of projects and can be proud of its own work. Thus, for example, when Pixar had issues with "Ratatouille" and Disney Animation had issues with "Bolt" (2008), "nobody bailed them out" and each studio was required "to solve the problem on its own" even when they knew there were personnel at the other studio who theoretically could have helped.