Take a look at some of these old threads to answer your question - you can do a search in the pre-vet forum for Animal Nutrition and find more, probably, but here's a few:
http://forums.studentdoctor.net/show...imal+nutrition
http://forums.studentdoctor.net/show...imal+nutrition
http://forums.studentdoctor.net/show...imal+nutrition
http://forums.studentdoctor.net/show...imal+nutrition
I took Purdue's course last spring, before the price went up astronomically, and really liked it. Very manageable and the instructor is great.