It is interesting that you make this last point. I keep an aquarium of wild mice in my writing room, and I like to add a few domesticated mice to the mix just to observe the differences in their sociological behaviors. It is quite surprising. Domesticated mice are dumb, just stupid as bricks compared to wild mice...but they actually have the same IQ potential (I have tested by wilding domestics and found them to be every bit as smart as naturally wild mice.)most predators are not omnivores they are carnivores so broccoli would not be on the menu but the animal that eats it would.
most animals are very specific on the target prey they have evolved for that particular prey to catch it. this is why some animal when the habitat is destroyed go extinct think of Polar bears they are designed for cold environments and hunt animals the live there such as seals when seals decline so do the bear population - some may argue this is not true because most animals will eat other animals not usually on the menu case in point humans so this leads to believe that it is true most are opportunistic and will eat for survival anything they can catch humans are the easiest thing to catch we have lost and replaced our instincts with technology and take everything for granted. Wild animals don't.
Essentially the domesticated mice have no culture. They don't even know they are nocturnal anymore. They crap and pee anywhere they please, climb over the tops of other sleeping mice, and expose themselves to all sorts of risks.
I actually see a lotta human behavior in the wild mice. Actually, humans retain a lotta their animal instincts and habits. We inherited our firmware from other mammal predecessors.