I've been looking over the Zootopia/Mistakes page and found two items that I don't think are appropriate.
The first is
* Two of the missing mammals, [[Barry DiCaprio]] and [[Stephanie Stalkinew]], are seen at [[Gazelle]]'s [[Gazelle's peace rally|peace rally]], despite the two previously being established as having become savage.
It should be pretty well known in the Zootopia community that because of the race to finish the film, already developed character models were re-used a lot to help provide background characters or fill in crowd scenes. Sometimes the reused character model had a palette swap done on their clothing, but not always.
However, my point is that when the Barry and Stephanie character models were being intentionally reused and these "clones" are not identified as Barry or Stephanie in any way than it's not really a mistake of the creative team and shouldn't be counted as such. I recommend the item be removed.
The second item is:
* When Bogo is assigning the missing mammals to the other officers, after he calls out the second missing mammal case, at least two officers disappear from behind Judy.
I've watched the scene a few times and the appropriate number of mammals disappear after each assignment call. There's no case where too many officers vanish at once.
Before Assignment (1) the bullpen shows...
McHorn (rhino), Judy , Wolfard (wolf), Delgato (lion), Higgins (hippo), Fangmeyer (tiger), Snarlov (polar bear), Rhinowitz (rhino)
Chief Bogo assigns Grizzoli, Fangmeyer, Delgato to rainforest district and they leave the room.
Before Assignment (2) the bullpen now shows...
McHorn (rhino), Judy, Wolfard (wolf), Higgins (hippo), Snarlov (polar bear), Rhinowitz (rhino)
Chief Bogo assigns McHorn, Rhinowitz, Wolfard to Sahara Square and they leave the room.
Before Assignment (3) the bullpen now shows...
Judy, Higgins (hippo), Snarlov (Polar Bear),
Chief Bogo assigns Higgins, Snarlov, Trunkaby to Tundratown and they leave the room.
Only Judy remains.
Following this flow, at no point did more mammals disappear from behind Judy than were supposed to so I recommend this item be removed.