they are sometimes metal because they cant escape.and if you get a wood block let them bite on it so they dont bite threw the metal and the wood will lower the teeth down to proper size and do that when they are too long.
No it cant
the fatter the gerbil, the thicker the bedding.
anything that has a smaller volume and area as the cage (height, lengh, width) Cardboard that has not been painted,A log house or a house not made out of plastic. Gerbil tubes and gerbil chew blocks.
Of coarse it can.
It is called a gerbilarium.
Syrian Hamsters will kill and eat a gerbil, do not put them together in the same cage.
Get a screen and put it in the middle of the tank/cage.
No, never do this. Hamsters are solitary, and it may attack the gerbil.
Because she is scared or excited and wants to tell another gerbil. Or she is calling for a male gerbil to mate with.
Take it out of the cage ASAP and bury it in a box.
any kind!
No. It is perfectly normal. This means that your gerbil needs some time to get used to his/her cage. Don't take it out for an hour or so after putting it in.