Gerbils aren't like rats and mice. They will fight and chew each other to shreds sometimes when you introduce them. So, when I found a pair that worked I let them be LOL. No sense in adding another woman in there. Its hard enough to pair one male and one female sometimes.
+1
Gerbils are such a pain to breed sometimes that I think they are *FAR* more trouble than they are worth.
"If I were stranded on a desert island and could only have one book, record and person...I'd probably die of exposure."