FYI: distiller's grains as a carrier option
This group does not seem to use distiller's grains as a carrier but Dr. Kellon mentioned them (maybe in NCRplus 2011 course or EC horsekeeping). I have been using them for a couple of years before Cory tested positive for IR. I recently tested two batches and they are under 6% ESC + starch. It smells like fresh baked bread and I can feed minerals as well as bute or other noxious meds in one cup (~ 150 grams). My local feed mill carries it. No soaking required, all I do is take a thermos of warm water up to the horse shed to mix everything together and eliminate dust.
Paula (Cory IR and Onyx no ECIR) in Bucks County, PA, USA
EC 2014 https://groups.yahoo.com/neo/groups/echistory8/files/Paula_Cory/