You might want to brace yourself because I've got some serious news. Animals don't behave like that. Lions do not speak to one another let alone to warthogs or meerkats, baboons don't present the future king to the savannah in elaborate ceremonies, despite being referred to as king of the jungle, lions are not monarchist and I can promise you they are not known for enacting their own version of Hamlet. (Disclaimer: I am not a lionologist.)
Within the context of the story they're lions and hyenas, yes, but the writers are telling a very human story. The same is true of Star Trek and even Tolkien. We understand the Klingons and Romulans because they're essentially human. We understand the Gimli and Legolas because they're essentially human. You're right, we don't need any humans to relate to a story. Not so long as we assign them human traits.