3 ideas
The animals turn the tables by locking the owner and trainers in the cages and then secure their return to their homeland. The tale treats the animals as exploited workers whose power appears only when they act together.
Children's fantasy lets readers rehearse a world ordered differently: animals refuse orders and captors end up in cages. That rehearsal undermines the idea that the existing hierarchy is natural and permanent. Regimes that depend on obedience therefore treat unbounded imagination in children's books as a political danger in its own right.
When the caged animals put their keepers behind bars, the story shows that who holds power is a matter of arrangement, not nature. The cage and the whip stay the same and only their occupants change. That reveals domination as a structure that could be reorganized, which makes the reversal effective at teaching even young readers to question authority.