* Territoriality: Gerbils can be quite territorial, especially females. Introducing two females, even if they are mothers, could lead to aggression and fighting, putting the babies at risk.
* Stress on Mothers: Having another female around can stress the mothers, potentially impacting their ability to care for their young.
* Competition for Resources: Two mothers could compete for food, nesting materials, and space, leaving the babies with less access to these essentials.
* Risk of Infanticide: In some cases, a new female could harm or even kill the babies, especially if she is not the biological mother.
What to do instead:
* Keep the mothers separate: If you have two litters of babies, it's best to keep the mothers in separate cages with their respective litters.
* Introduce slowly: If you absolutely must introduce the mothers, do so very gradually and under careful supervision. Start with short periods of supervised interaction and monitor their behavior closely.
* Provide ample space: Ensure both cages are large enough to accommodate both mothers and their litters comfortably, minimizing stress and competition for resources.
* Consult a veterinarian: If you have any concerns about your gerbils, always consult a veterinarian experienced with small mammals. They can offer the best advice for your specific situation.
Remember, the safety and well-being of the babies are paramount. It's always best to err on the side of caution and keep the mothers separate.