1. Judy's mom and dad are terrible parents
On a surface level, Bonnie and Stu are pretty decent folks. While they're a little stuck in their ways, Ma and Pa Hopps do show the capacity for change when they start working with Gideon Gray the fox/former bully. At worst you could say that they're overprotective of Judy, who they are constantly fretting over when it comes to her career and life choices.
In fact, Bonnie and Stu are a little too worried at times. I mean, don't they have other kids to look after?
It only makes sense that the Hopps family would multiply like rabbits, but that means they don't have a whole lot of time to devote to each kid. Judy was still in grade school and she had almost 300 siblings; that number has to have grown in between then and her graduation from the police academy. But even if Stu swallowed his pride and finally got a god damned vasectomy at some point, that's still an unbelievably big family to take care of.
Which makes it all the more surprising that Bonnie and Stu are such good parents to Judy. They're constantly worried about their kid and take time out to chat with her on a regular basis. Their constant phone calls are so prevalent that they even get Judy in trouble while she's on the case.
A couple who parented hundreds of children can't possibly have the time or resources to pay proper attention to all of them. Hell, the Duggars had 19 Kids and Counting and you know they went weeks without remembering little Justin existed. It really seems like Bonnie and Stu chose to raise one daughter properly at the cost of dozens of other forgotten offspring. While Judy's story of a plucky bunny following her dreams is all well and good, any other movie involving a Hopp family member would probably follow one of a hundred depressed and overlooked kids toiling in obscurity. Might make a decent Dreamworks movie at least.
2. What do the predators even eat?
The beginning of the movie takes great pains to explain that while predators like lions and leopards used to feast on smaller, more helpless animals, there has since been an enlightenment followed by peace. Predator and prey live together in surprising harmony, like peanut butter on a burger, or you and your stepdad after he bought your love with the new Ninja Turtles video game. It's an especially important setup that plays into the later developments of the plot and the overall themes of the movie, and in general it works pretty well! Except... if the predators don't eat prey, what are they eating?
Though some predators are omnivores, which would give foxes like Nick a fallback diet consisting of blueberries and other fruits, others aren't so lucky. Mayor Lionheart is a straight-up carnivore whose biology demands he subsists on meat wrapped in meat in a meat sandwich where the bread is also made of meat. If he's not pigging out on other mammals, what the hell does he have for dinner each night?
To their credit, Zootopia's writer/directors Byron Moore actually had an answer for this: bugs. The predators of this universe subsist on insect protein in the form of cicada burgers and cricket chips, among other items that presumably cost $27 each at Whole Foods.
While that's a decent explanation, it sort of leaves out the fact that animals are seen eating food that most likely contains animal products, like ice cream and cake.
Cookies and Cream typically contains milk for the "Cream" part of the equation, meaning that somewhere some intelligent cow is squirting her boob juice into a bucket for the consumption of her neighbors. Cake commonly contains not only eggs, but also eggs. Birds don't appear in Zootopia, but they are mentioned by Gazelle in a song prominently featured in the movie; the producers also mentioned that birds (along with lizards) could appear in a Zootopia 2. If that's the case, eagles, falcons and chickens might not be thrilled about other species dining on food cooked with their unfertilized embryos.
But alright, let's give the movie the benefit of the doubt and assume that's soy ice cream and gluten-free vegan-friendly cake. That still doesn't explain this:
During our introduction to the city, we're shown Tundratown, a snowy burough that happens to be populated by a bunch of polar bears. Judging by the signage, it would appear that these predators still eat fish. It seems pretty unfair and frankly hypocritical for a movie whose themes include "accept everyone" to also include a clause that states "except fish, fuck those guys."
You could argue that Zootopia and its surrounding area is strictly mammal focused, that it was only mammals who ascended in this universe -- but what about the aquatic mammals? We know that otters are around, and they wear delightful sweater vests. So where do they draw the line? At whales? Dolphins? Sea lions? Manatees? Surely at least one of those groups would be impacted by the rampant fishing in Tundratown, least of all the likes of Nemo or Flounder.