Yes they can, and if left untreated, can be fatal within a few days
Definetly not more of whatever the heck it had diarrhea from
Yes. Gerbils can eat most vegetables and fruits EXCEPT for citrus. Don't give them too much though or he'll have diarrhea =(
Other gerbils.
Gerbils are an animal and can not be "invented".
Male gerbils can be neutered, but it is not recomended. Female gerbils should not be spayed. In general male gerbils should not be neutered unless there is a good reason for it.
no gerbils are not originally from the UK but instead from the deserts of Asia. But you can still buy gerbils in the UK
Yes, mice are smaller than gerbils, but I think gerbils are the right size.
They do have seizures (this is common in young gerbils)
No, Gerbils are vegetarian.
No, they are not related. Gerbils are rodents, Rabbits are not.
Gerbils and nothing else.
Yes, e.g Mongolian Gerbils.