The question of nutrition

I know everyone has their own program that works for them, but I like exploring what works for everyone else.  I feed the best alfalfa hay I can find, with barley as a winter/lactation supplement.  I've recently come across some information on soybeans.  Soybeans aren't a crop raised in Utah, so I didn't think much of it until I read the article.  Soybeans contain up to 44% crude protein, and 30% fat.  What could be better to feed to lactating does?  High fat should bring up the fat in the milk production and maybe producing more milk at the same time.  Too bad its not at my disposal!!!  This feed could be gathered up at pennies for some one in the Midwest compared to my dollars out here in Utah.  I can get the same amount of protein from barley if I increase the amount I'm feeding, which, after doing the math......I'm only $.03-$.10 cheaper per pound of crude protein by feeding barley. Only because soybean is not in great supply here.  So, I'm still feeding alfalfa and barley.  But it could be a cheaper way to feed for someone that is near an over abundance of soybean crops.