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My gerbils bred! How to separate and introduce new gerbil pairs?

Updated On September 23rd, 2025

Pet's info: Small Animal | Unknown - Small Animal | Female | unspayed

I accidentally adopted a breeding pair of gerbils (I was told they were both females.) The female is pregnant. I want to seperate them and pair them with same sex gerbils to prevent more litters. What is the best method?

1 Answer

Most Helpful Answer

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Answered By Lotus Altholtz

Veterinarian, Board-Certified Lab Animal Medicine Specialist

Published on February 16th, 2018

I recommend separating the male and female now before the female gives birth to avoid potential cannibalism of the pups by the male. Other than the female having an obviously distended belly, females have a shorter anogenital distance than males and lack a scrotum. For the pregnant female, I would not try to house her with other females until after the pups are weaned at 3 weeks of age (also to prevent cannibalism). When ready, the split cage method is recommended for introducing males or females that are not from the same litter. It involves keeping the 2 males (or 2 females) separated by a divider (plexiglass with holes drilled placed corner to corner dividing the enclosure into 2 triangles works well) and switching the gerbils 4-5 times a day for at least a week to get them accustomed to each other' ascents. After a week remove the divider only when you are able to carefully monitor them for fighting for 5-6 hours or longer. Generally they cannot be safely left alone together until you see them grooming each other and sleeping next to each other. Even then, if you notice any bite marks/wounds on either gerbil, separate immediately and do not attempt to rehouse together. Best of luck!

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