She was already chubby! We don't know the age!SugarLovesRats said:well if she is over 5 wks old and was with a male for a few days there's a good chance she is preggers! Pregnant rats usually make a nest, so if she's nesting that's a possible sign. Also if you hold her up and look at her belly a pregnant rats belly takes on kind of a pear shape. Anyway best of luck, I hope she's not but if she is good luck with the babies!