I’m just saying that using non-soy protein sources makes things more $$ by default. You’re right, the vast majority of horses don’t have issues with soy. I have no problem feeding soy. But enough horses do, there are enough people out there who don’t want to feed soy because of the GMO and “soy is evil” notion, that there’s a demand for it. So many threads get started for soy-free ration balancers.
I would question the statement that the majority of horses don’t have any nutrition deficiencies (not sure why that’s an issue here, it’s just another fortified feed, no different from anything else). The question is just what, and is it an actual deficiency or is it an imbalance. I guarantee horses who only eat hay are Vit E deficient, and that’s a lot of horses in some areas of the country.
Triple Crown is getting ready to release a soy-free ration balancer - I have no doubt it’s going to be a huge hit.
I have no idea if that price is so $$ that I could feed significant soy-free, well-fortified calories for well below that cost. That’s $1.13/lb, and 5-ish lb would be $5.63. Certainly not cheap. But it may be very well worth it for the harder keeper who can’t tolerate soy.