Here are several sites I have used for reference in my Rodents diets. They contain both Forbidden Food Lists and lists of a nutritionally balanced diet on the following sites.

http://ratfanclub.org/diet.html
http://www.freewebs.com/crittercity/...ealthydiet.htm

Here is a diet I have fed my rats since I can remember. Suebee has put together a wonderfully balanced diet for rodents. I also offered them Harlan Teklad or Mazuri lab blocks.

http://www.ratsrule.com/diet.html

Forbidden foods for Rats also apply to African Soft Furs.