boys will have the sack girls will not
You have to look under them between their hind legs. On male there will be a penis on the lower belly, on females there is a triangular shaped vagina just below the anus ( butt )
if your gerbil is a female there usally quite small so you can tell by looking at there stomach like humans they get a bump and sleep more often but its best to get two of the same sex.
male gerbils have a small slitt in their stomack and femals dont
Because she is scared or excited and wants to tell another gerbil. Or she is calling for a male gerbil to mate with.
If your gerbil is healthy it will have soft shiny fur,bright eyes and a clean nose.
Look on his back side. If it is a Female there are no lumps, the gaps between each ahem holes are larger on a male and smaller one a female. also it is like a baby kitten. the only way you can tell its balls. if it has some then its a boy.
Cut it in half and count the rings.
Yes. You can tell if your gerbil is scared if he shivers or if he chatters his teeth
There are many differences between the male and female pelvis. From those points, the forensic expert can tell the sex of the pelvis.
If they are good at sex
you can tell because if its nose changed a different color like light purple
to tell the difference between the sex you have to look at the shape of the head if it is a female they have long narrow head, if it is a male it is the complete opposite, males have short stubby heads.