The Dove/pigeon feed has - in order of listing so presumably in order of prominence within the feed - milo, millet, wheat, corn, safflower, groats, soybean meal, canary seed, buckwheat, flax, and peas, plus over 13 lines full of refined additives, and ending with the user-friendly and easily readable rosemary extract, with a whole line to itself. (Those additives are presumably the powder/dust that people have been talking about elsewhere with reference to such 'wholegrain feeds'.) I would offer that to my flock minus the dust, if the sack was dated less than a year old, and had been stored properly i.e. dry. Any component the chickens didn't eat, I'd leave on the lawn for the wild birds and other wildlife, and I would expect relatively little to be wasted. Anything still on the lawn the next morning, so having been rejected by all wildlife that passed by in the crepuscular hours and the dark, would worry me and put me off that feed. That assumes there is wildlife in the form of birds, small mammals, reptiles or amphibians etc. passing through your garden overnight; obviously if not, that test won't work.
The Kalmbach's 3 principal ingredients are corn and soy (including soy in 2 different forms), and overall seems insignificantly different from regular commercial layer feed, except that it has not been milled or pelletised. I would not offer that to my flock. You do what suits you.
