Sort of. While the core concept and some events in the film are based on real-life experiences, it's likely that some elements have been dramatized or adapted for the big screen to make it more engaging and cinematic.
To a large extent, it is. However, as with many adaptations, some creative liberties may have been taken to make the story more engaging on the big screen. But the overall framework and inspiration come from a true account.
The movie is based on a true story. It tells the tale of a person's decision to purchase a zoo and the challenges and joys that come with it. Although it may have been dramatized for the big screen, the core concept is true to life.