2 Answers

I do not know where you are from, but any land-grant university in the US, could help you.  These are the colleges who have agriculture curricula, and in particular, any with animal agricultural programs could help you.  I used to teach at a agricultural high school, and there may be one in your area, and they may be able to help you formulate a ration.  Another resource may be the Cooperative Extension Service, part of the Land Grant colleges, they may have a Livestock Specialist, if you are not from a non-agricultural state.  They have websites as well, the Land-Grant colleges, Texas A&M, Iowa State, Ohio State, for ex. 

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