I have been using a similar recipe for homemade chicken feed for my hens, (using rye berries and triticale instead of buckwheat and barley, and adding lentils), but when one of my chickens died today, I was told by the Dr. who did the necropsy that she died of Mariks disease, had too much internal fat, and was low on calcium and Vit. D. They get oyster shell free choice and are on grass all day, scratching for bugs in my flower beds. I may be putting out too much feed and they pick what they like and don't eat it all, thus getting an unbalanced diet. Has anyone done an analysis on this particular recipe? How would I add vitamins and calcium to the recipe?Right now my chickens are getting a mix of homemade and commercial to make sure they get everything they need while they're still growing, but I plan on phasing it out after my current bag. To be honest they don't seem to eat much of the commercial anyway and I think most of it ends up thrown onto the ground or left in their bowl, so I take that as a sign they're doing okay with just the homemade. I based my recipe off this one, but changed it slightly to fit what's available in my area because shipping from Azure Standard would be too expensive for me. I also cut back on the sesame because I noticed my guys were leaving a lot of those behind. I've bracketed anything that would need replacing (I noticed you had oats in your recipe, so I'm assuming you're okay with oats and left that in).
4 cups oats
4 cups black oil sunflower seeds
6 cups (wheat)
2 cups buckwheat
2 cups (barley)
2 cups millet
1 cup sesame seeds
1 cup flax seeds
1/2 cup brewer's yeast
1/4 cup kelp granules
Free-choice oyster/eggshell and grit