Josey,
I used these tubs to house the mice, and use cement tubs to house the rats since the rats are bigger and unlikely to get though "gaps".
http://www.bigappleherp.com/Big-Apple-Rodent-Cages
I found some Valley rodent chow that's 14.00 a bag for 40 lbs..much cheaper than the $30 something for Mazuri for 50 lbs..I do a mix of both.
Regarding what people say about feeding meat, I haven't found that to be so in my case. Consider: When I first started breeding I did have a high rate of cannibalism. My rationale was that they may need "some" fat in their diets, especially the nursing dams. I started adding meat bi weekly in the "nursing" tubs (no, I don't separate anything but the weaners usually because there are usually too many and they take milk from the newborns)...anyway, since adding meat, I have had zero incidents of cannibalism. Babies that die from suffocation, yes..but they lie there..no one eats them.
I add:
Left over chicken, or fresh hotdogs, fat from steak, etc. They also get, corn on the cob, dried corn from the feed store, carrots, watermelon, apples and I am going to set up the rodent room with lighting on a timer (eventually).
I sometimes mix in cat food (the kind that contains veggies. I was advised to try dog food when I first started breeding my own for both species of rodent, but I didn't find any of the brands that I tried to be benefical at all. Both rodents, however; DO love the "cookie" dog treats.
Both my rats and mice have large litters, I am usually running over with rodents and have to freeze them, then I have to get rid of what's in the freezer to freeze the next batch.
Production slows down in winter (YAY! because the snakes slow down consumption) and I use that time to grow out some of the holdback females take the males out (keep a few) and do the culling. I haven't noticed any skin diseases, any more tumors, etc.
The one problem I do have is when they don't chew the wood, their teeth over grow and I have to cull them.
Hope this helped in some way.