Thanks For The Fox - Zootopia Fanfic - Alps Sarsis

Judy and Nick have been partners on the force for a few months now, and they are adjusting well to their new and exciting combination of friendship and duty. However, when Nick suddenly refuses an assignment from Chief Bogo, Judy learns a very dark element of Nick's past that threatens his new-found happiness.

Judy decides to interfere, even against her partner's wishes, but what she discovers may give back the joy she knows her favorite fox deserves.