What’s better than rats? More rats!
Procreation at R0d3nts is a little bit different from procreation in the real world. It does not have to involve active participation from any of the involved parties, and the gender and number of parties seems to be flexible. Mad Science knows no bounds.
As long as they’re not related, any two+ rats can spawn new rats, which appear as if by magic. Sometimes breeding happens on purpose, sometimes it just happens. The staff here at R0d3nts try not to stress about it too much.