Thank you for the replies. I knew it wouldn't kill them, as I have been feeding my horses this stuff for years...ever since I bought my first riding horses back in '92, but truthfully, I didn't even know what grains were in it! The stable that I borded my first mare at, fed this, and she swore by it, so that is what I always fed, just taking her word on it.
I tried emailing the company to learn the ingredients, but never got a response, so I asked at the feed store. She called me back today, and informed me that the grains it contains is is barley, with 20% crushed corn. I am sure the barley must also be rolled or crimped as it is flattened. As for the brown pellets in there, that must be the mollasses and other minerals etc. that are added to it???
What I am feeding, is called "Dairy Ration". I think it is made more for cattle(thus, the name) but I have never had any trouble with it working well for my horses, when I mix it in with other stuff I like to feed. I take a 40kg bag, and mix it with 50kg of rolled oats(for horses), making it almost half and half dairy ration and oats. Then I add a 20kg bag of BOSS to the mix, and that is all I feed. They also have mineral salt blocks set out all the time, and of course, hay in winter or as needed.
I think my horses are healthy, and yes a little(or in the case of some, maybe a lot) overweight, but I prefer them that way going into winter each year anyway, as they are outside 24/7, with only run-in shelters.
So yes, it is plain, and simple, but if it works, why "fix" it.
Here is the label with the ingredients(except for the barley and corn) that are in dairy ration:
Here is a pic of a handful of the dairy ration:
And this is a pic of a handful of the dairy ration with the oats and BOSS added, so is the final grain product that I feed to the horses: