[QUOTE=Palm Beach;8448540]
goodhors, your math is off. If you want your completely mixed feed to be 10% soybean meal, you will have 40 lbs of soybean meal and 360 lbs of other stuff.
40/400x100=10%
If the total completely mixed feed is 440 lbs, including 40 lbs soybean meal, the equation is:
40/440x100=9%[/QUOTE]
Thanks for the math correction. Not paying close enough attention.
I wanted to add after crosscreeksh said that they added the vitamins and minerals to their feed, that there can be problems feeding this way. Insuring that EACH animal of all the various sizes and ages mentioned, gets the correct amount of vitamins and minerals will depend on them all getting the same amount of grain daily.
I am pointing this out, because I used to have my vitamins and minerals mixed in according to the formula, but then we were not feeding that amount of grain daily, so my horses were deficient in Seleinium and Vit E with their work load.
These days we top dress all supplements, Vitamins, the Selenium and Vit E, so we KNOW each animal got their correct amount along with their different sized servings of grain. Top dressing is much better for this reason, no one is going to be deficient no matter how much or how little they work, their ages or sizes. Our working horses work hard, sweat almost every outing, which uses up Selenium fast. There is no Selenium locally in the ground, so all the horses get is what we supplement them with. We had two horses get in trouble with lack of Selenium years ago, which is why we changed to top dressing the extras. Horses in work get tested to insure they are getting enough Selenium, despite being worked so hard and being sweated almost daily. Horses really don’t store Selenium in quantity like fat, just have it in their body as it works it’s way thru.
So having Vitamins mixed in or top dressed to feed them to horses is something for OP to consider. My experience is that I don’t feed enough grain daily, to get enough vitamins etc. into my horses. They don’t need that much grain, even in harder work.