Just checked on the litter. They will be a week old tomorrow and they have peach fuzz. I still can't tell sexes yet as I (even with photo examples) cannot tell them apart at this age. Though I do have a question. On a mouse forum I'm on it shows you how to sex mice up to a certain age. The photos provided for 6 day old mice (which is how old mine are) show furred mice with the females showing nipples. Mine are not nearly that furred. Actually you can barely see the beginning of their fur growth. Could it be that they used the wrong picture or are mine just really slow? It has been so long since I bred mice so I can't really remember when they hit certain stages of growth during these 3-4 weeks.
They are all dark in coloration but as of right now I cannot tell if they will be black or blue.