Because of rising costs, I have looked at using corn gluten as a feeding option. Buying in bulk and feeding less quantity because of the protein content seems inviting. What are the health issues, if any, with this type of feed for horses?

Corn gluten feed can be variable from batch to batch in energy content and quality, so a big part of the answer deals with the consistency of supply. If energy value varies by 15% from batch to batch, which isn’t out of the question, then you have the potential of over- or under-feeding, which would be like altering the amount of a consistent grain source without changing how much you feed. That would increase incidence of colic if you are …