Now that you have your breeding pair, all you have to do is
introduce them. Gerbils are very territorial creatures and will
not tolerate being put together without any sort of
introduction. Improper introduction will usually result in
fighting and your gerbils can get severely hurt. In the wild,
one gerbil would chase the intruder away, but in a tank there is
nowhere to go and so they will fight to the death. There are
some instances, however, where an introduction period may not be
necessary. If both gerbils are under the age of 8 weeks, or if
one is a lone adult male gerbil and the other is a female gerbil
under the age of 8 weeks, a split cage may not be needed. In
both these cases, the gerbils may take to each other
immediately, but if you see any hostility, you will need to use
one of the two methods below. Main methods of introducing
gerbils Split cage method For this method you will need a tank
and a piece of wire mesh (hardware cloth) that is cut to fit
diagonally across the tank, from top to bottom.