just google the dyes and rats or rodents and typically you com up with stuff like this:
heres red dye number 40 http://www.ncbi.nlm.nih.gov/pubmed/6636206
some others on other legal ppl food addititives http://www.sixwise.com/newsletters/0...e-aware-of.htm
this also
http://www.feingold.org/Research/dye.html
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