Hmmm . . . backstory is always a tricky thing. Here is one situation where it go handled very well.

I swear, I only saw it for the sloths. Yet, by the end of the first two scenes, I had already learned more than enough from Zootopia (2016) to pack up the popcorn, leave the theater, and write this…

Source: Writing Better Characters: Zootopia’s Clever Lesson on Backstory | P.S.Hoffman