I went to my local feed store and was looking at all the different feeds they had. They didn't have any straight corn meal or anything like that. They did have some alfalfa, but it was not easily spreadable. The most promising material that I was looking at was a feed for game fish. It contained a mixture of soybean meal, corn meal, alfalfa, fish meal + many other things including some B-vitamins, micros, and salt. The label states that it contains 32% protein which is what you want right? Most of the other feeds (horse, goat, poultry) had 10% or 16% protein. It costs $20 a bag, is this too much? Is there any formula to figure out how much N you get based on the protein percentage?