Milo isn't one of the more palatable or better grains to feed but I do include it in my ration, simply because when I had screenings available the birds ate it. It has about 75% of the nutritional value of corn from what I've been told. I figure it in the ration as I do all the other grains and make adjustments as necessary. I do not include as much of it as I do the other grains. The scratch my feed mill makes includes more of it than any other grain because it's cheap.
When I was younger I heard that they about bred the taste out of milo trying to make it less desirable to insects. Problem was, nothing else liked it, either.