I hated mice and forgot most of what I knew about them, BUT, you should NOT be feeding the beardy mice nearly that often. They eat greens and insects, mainly greens when adults, and mice are extremely fatty for most lizards that aren't tegus.
Personally, I breed rats. Easier, smell less, produce more, get along better. I tried ASFs, but they wouldn't grow, wouldn't breed, and kept killing and eating each other.