if your gerbil chews its cage bars, then eventually it will wear away the hair on the top of its nose.
if its in a pair maybe the other one has hurt it or it might have fleas/mights.
No it cant
the fatter the gerbil, the thicker the bedding.
you should really take it to the vet. i don't think it is a good idea to put the injured gerbil back in the cage though.
Of coarse it can.
It is called a gerbilarium.
Get a screen and put it in the middle of the tank/cage.
Syrian Hamsters will kill and eat a gerbil, do not put them together in the same 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.