Our my mice too Young?

I have about 20 mice, all weighing in between 20-32 grams, most of them on the low 20s, 1 males to 4 females each, I got everything down backed from what I know, temp 70-75, water, food, clean substrate, no action, all they seem to do is just sleep, sleep , n more sleep,sometimes thro in the wheel for them to run, all they do is eat, drink, poop n sleep, not much movement

Ive had all the mice going on 2 months now, not 1 prego

It could be that they're too young. Also, sometimes the females refuse the male for a little while but eventually give in :P But, it's weird that they've been together so long and no pinkies.

Maybe it is that they're too young.

You should also check out this thread:

http://ball-pythons.net/forums/showthread.php?t=79742

I've heard that mice reach sexual maturity at around 6 weeks of age. So basically your mice are not too small. I would get another male and see what happens, don't have both males in the same cage though, that could be trouble.

usually if i see no pinkies or large bellies after 3-weeks, i'l change the male.