And it's not just no-predator; this is a world that clearly has food safety rules, so communicable disease and parasitism (which is probably a bigger killer of wild bunnies than predation) are probably non-issues, and, like our world, the biggest killers are probably accidental death and "long term" diseases like cancer and heart disease. Stu and Bonnie are also obviously protective of all their children; they aren't losing their children left and right and are all like "well, there's 221 left where that came from". I assume that "Bunnie Burrows" is exactly what it says; except for a few necessary above ground buildings, it's all underground, allowing them more land to farm. In fact, Zootopia itself might be the tip of the iceberg, and the vast majority of the population live in "dens" underground.
That being said, the growth rate shown on the sign leading out of Bunnie Burrows is just so not sustainable in the real world, other than to say, well, the animals of the world of Zootopia have obviously had a bit more time (and minds!) to think on the problem; the screenwriters might not have come up with something in three years (when they weren't really trying other than to write a quick joke), but a billion-billion bunnies over a couple thousand years might have cracked something.
And it's not just no-predator; this is a world that clearly has food safety rules, so communicable disease and parasitism (which is probably a bigger killer of wild bunnies than predation) are probably non-issues, and, like our world, the biggest killers are probably accidental death and "long term" diseases like cancer and heart disease. Stu and Bonnie are also obviously protective of all their children; they aren't losing their children left and right and are all like "well, there's 221 left where that came from". I assume that "Bunnie Burrows" is exactly what it says; except for a few necessary above ground buildings, it's all underground, allowing them more land to farm. In fact, Zootopia itself might be the tip of the iceberg, and the vast majority of the population live in "dens" underground.
That being said, the growth rate shown on the sign leading out of Bunnie Burrows is just so not sustainable in the real world, other than to say, well, the animals of the world of Zootopia have obviously had a bit more time (and minds!) to think on the problem; the screenwriters might not have come up with something in three years (when they weren't really trying other than to write a quick joke), but a billion-billion bunnies over a couple thousand years might have cracked something.