I apologize for not responding sooner, I didn't get a notification.

Anyway, I got all of these as babies (around 4 weeks of age). They were from two seperate litters but they were still babies. Nonetheless, I did figure out the problem.

Since they were purchased so young and I had separated them into colonies at that time...The person I purchased the 4.12 from actually gave me 6.10. I lost 3 males because I thought 2 of them were female (their bits weren't showing in the least till a while later). I actually fed on of them off when I discovered their were two males in the bin. I fed off the one that kept getting beat up. The other two were killed by the other males in their bin.

Now they are all set up in racks, producing like crazy (probably 100+ born in the last 4-6 weeks). My rats are now all bitey instead of sweet like they used to be. So apparently they are your typical ASF. I just didn't realize their were extra males before.