https://www.youtube.com/watch?v=dEj5qwsDn3o

Clawhauser calls Judy cute, she goes on to say these exact words:

"Actually, only a bunny...can call another bunny cute. When other animals do it...it's kind of, ehhhh."

Also in the movie, they repeat this mantra with a fox. "Only a fox can call another fox sly."

Some more stuff about racism:

http://www.theroot.com/articles/culture/2016/03/zootopia_yes_disney_made_a_movie_about_racism_but_with_talking_animals.html

Judy and her partner, a sly fox named Nick Wilde (voiced by Jason Bateman), discover that there’s a drug being put on the street that causes predators to “go wild.” They become violent, smash up property and attack other animals like...animals. While the drug has the same effect on small prey animals as well, all of those deeply affected by the drugs are predators like panthers and otters (all of whom are voiced by black or Hispanic actors), and that plays into long-existing stereotypes in the prey community that predators are inherently violent and can’t be trusted.