So, the babies are three weeks old today.
And after spending about an hour and a half MAKING SURE, all 10 of them are boys.
I'm keeping Dr. Tran and one of the beiges, and have a possible home for the other beige.
There's individual pictures of each rat at my Flickr:
If anyone in the Seattle area would like to adopt one (or seven!) of the hooded boys, let me know!