Originally posted by wolfsoul
Actually, Frodo was supposedly only 4 - 4 1/2 weeks when I got her. She's grown, but she's the exact same size as Fink, my dad's rat, when she was only 4 weeks old.
You said you have had her a week, and to me she looks around 2 months old, being 8 weeks. So she was ripe so to say, to get pregnant.