don't feel silly at all. I bought my first mice from a 'breeder' who was selling up. Despite alarm bells going off when I was stood in her house, I still bought them and it turned out all the females were pregnant. When I spoke to her about it she went from 'professional' to 'ignorant', claiming not to have known etc etc and was I sure they haven't gotten pregnant here... well, no, I didn't have any males at the time! lol. It kind of took the fun out of selecting what I wanted myself but it was a very quick learning curve into mouse breeding. I was intending to breed but not quite like that! Suffice to say it doesn't matter who someone says they are now and how professional they sound, I'll be checking and double checking. It happens to everyone probably just once. How are they doing now? If you decide you want more at any point, I am a new breeder (approx 6 months) but I do have pet mice babies free to good homes if you don't mind travelling to Dorset to get them xx