Oooooh spreadsheets..... now that is something I am glad you did and figured out so that I didnt have to......

I guess I wont be feeding most of the baby males now; but it makes sense that smaller groups would produce more; I notice my 1.5 groups dont have a great survival rate per litter when there are more than a litter or two already on the ground so to speak. It seems to average a half dozen per litter but early litters are always around 15..... conclusion = Mike is the man!
Anyhow Mike, thanks again!!!!!