Ok, I know I'll need pics for this. I thought I put them on photobucket already but I didn't so I'll put them up when I get home from work. But I figured it couldn't hurt to go ahead and start getting some opinions. My little runt boy (or so I assume) has yet to recieve his manly attributes like his brothers. The other boys got there's about a week ago - I swear they showed up over night :giggle: Up to this point I have always been confident he was a boy. Never any sign of nipples. Distance from urethra to anus longer than when compared to the girls. He has been slower to develop than the others in other ways as well (eye opening, walking, etc). I poke and prod the poor little guy daily trying to see if I missed a tell tale sign. So I'm starting to get nervous that he still doesn't have them. Then I read somewhere this morning that sometimes the vagina on a baby rat isn't obvious until they have had their first heat cycle (is this true?). The fact that I have only been able to find one opening on him as well as no nipples, was my deciding factor in putting him with the boys. Has anyone else had a late bloomer? Or does it seem as if I may have made a terrible error? He will be 6 weeks old tomorrow. Hopefully if I'm wrong, it's still early enough and nothing has happened. :?