Gerbils normally range from 4 inches to 6 inches but if you buy the new gerbil stretching rack as seen in The Princess Bride on www.imsoangryatthisquestionicantseestraight.com then it is possible to make your gerbil up to 1 foot long!!!
Gerbils can have up to 13 or more pups in a litter! Quite a range, but 6-8 is the average.
Other gerbils.
Gerbils are an animal and can not be "invented".
No, any rodents within the repeller's range will also be affected by it, sadly.
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.
Yes, e.g Mongolian Gerbils.
They do have seizures (this is common in young gerbils)
No, they are not related. Gerbils are rodents, Rabbits are not.
Gerbils and nothing else.