Hey Paula, thats great, sounds like you are progressing along nicely, you'll be surprised at just how fast your first litter is here!!!! I know it seems like an excruciating wait now, but the time will start to fly, I promise you!!
I actually just took weights on a couple of my breeders last night:
My 2006 female that produced a litter of 25 babies in August 2010, and whom I gave the year off to, weighed in at 6.5 pounds. She is probably fed 24 medium rats per year give or take.
My 2006 male that has fathered a couple litters in his time weighed in at 5.5 pounds!!! I feed him on average 12-16 medium sized rats per year, definitely not over-fed, but healthy, muscular, and in good shape!!
Back when I was just getting into BRBs and my first female was only in the 3 pound range, I had always heard things like "minimum to breed is 2.5 years and 3 pounds." I had no idea that this is NOWHERE near the size of a full grown, mature adult. I ended up waiting to take my shot at my first litter until my adults got larger and this paid off amazingly!! Her first litter had 25 babies, and I am quite confident that had I bred her one year earlier she would have had 1/2 the babies or less!! This has allowed me to give her the year off while still getting great production from her in breeding years. Just food for thought and my opinion from my experiences!!!!
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Ike Lightner
2.3 BRB Breeders(Dugo, Sultan, Roxxy, Brazita, & Lucille)
1.0 BRB striped holdback of my 8/23/10 litter of 25 (Nando)
1.1 100% het hypo BRB (Diego & Rasheena)
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0.2 BRBs still in CALI, about to join me in Missouri!!!! 1 hypo/1 het hypo (Ireena & Liddia)