So, at the beginning of January, I decided to get a rat, then after reading up on them, decided that rat should have a companion. I now have Da Vinci and Picasso. Before, I was certain they were the same gender, and both male. Now I'm still certain they're the same gender, but they're both girls! While Da Vinci has been with me for a month now and no babies, I got Picasso a couple weeks ago and imagine my surprise, I went away for a weekend and came back to discover a litter of babies in a box after hearing the box squeaking. Clearly, Picasso came to me pregnant. While she's doing a great job taking care of them (I can see milk in their bellies and she insists on putting lots of warm fluffy stuff in with them, I wonder if I should be concerned about having another female rat in the cage with a new mother?