Yes, hard-boiled eggs are actually very good for pregnant or nursing mothers as it provides them with extra protein to better nurse their pups. Young gerbils could use it as well. Always monitor a gerbil closely when giving it new foods to make sure it reacts well.
You shouldn't feed them meat. Even though they are omnivorous, it is best to feed them fruit, veggies, and nuts and seeds. The food you need to give them comes in a bag and is available at most pet stores and feed stores. If you would like to give them a treat, then dried apples and carrots and sunflower seeds would be best. Give them the sunflower seeds in moderation, though, because they make the gerbils fat (the gerbil equivalent of potato chips)
I don't know but don't try it because i know they can eat hard boiled.
No, gerbils are plant and food pellet eaters.
No, they cannot eat them. But can eat many other fruits and vegetables though. You might want to search that up too.
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.
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.
No, Gerbils are vegetarian.
Not really, because gerbils can climb chicken wire (I've seen one do it with my own eyes!) and when they climb it, it damages their paws or they could escape. A good choice for a gerbil cage is a large fish tank with wire mesh as a lid, since you can hang things like water bottles down from them.
No. Gerbils produce gerbils and guinea pigs produce guinea pigs