Rats birds chinchillas kangaroo rats and other rodents and small animals besides the ferret because ferrets can kill a full grown human with one bit but they don't have Poisson in their body so cats are scared of ferrets
the other animals get scared of them
no, rats bones are truly unique. No other bones are like this.
Because they are scared and forcefully made to be together. If they can be away from by choice they will be happier
A deer scared of a wolverine
There birds, so they are kinda like flight animals and scared of other animals
water
I've seen rhinos in the wild. They don't appear to be scared of any other animals.
If rats can't find plant items to feed on, yes rats will feed on garbage or even animals. However, the animals that rats feed on would already be dead. Rats are scavengers; this is also why rats carry so many diseases. Only when rats can find no other food sources will they turn to something living.
Yes they do just like such other animals.
Yes, rats, at least wild rats, are very aggressive to most other animals. Rats are omnivores, meaning they eat both plants and animals. So eat anything if they can capture it and kill it.
Rats are just like other animals in that they are looking for shelter and food. If those attractants are taken away, the rats will leave.