If you don't have it already then here is a link for the nutrient composition of some prey. It doesn't list all of the nutrients but had more than I expected it to.
http://www.nal.usda.gov/awic/zoo/WholePreyFinal02May29.pdf
May help
http://www.nal.usda.gov/awic/zoo/WholePreyFinal02May29.pdf
May help