She could be. It's not a good idea to have them in the same cage, even if it's divided. It's super risky and if the boy was in there for any period of time, it's likely at least one of your females is pregnant. The best thing to do with an accidental litter, which will most likely have tons of problems, is to cull them before they reach 10 days. You do this by putting them in the freezer, since they have no nerve receptors before they reach 10 days old. Good luck to you, I would definitely recommend getting two separate cages.View attachment 310753
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So, I have girl and boy rats, and they are all in a critter nation cage. Boys on top, girls on bottom. The boy seemed to have chewed through the plastic and one of the girls got in with the boys! I have no idea how long she was in with them, but could you guys let me know if she looks pregnant? (This happened march third, and today is the 13th. It’s been a week and three days)