I found that the articles say that growing fodder is economical.
They lied.
No, really, THEY LIED.
Not only is fodder imbalanced - you can no more nutritiously feed your birds mass quantities of corn than you can wheetgrass/catgrass, actual cereal wheat, oats, barley, sorghum, etc than you can bags of scratch, boss, etc, - that's why a carefully selected mix of ingredients fill the commercial feed. And you can't begin to make it economical unless you have lots of land, the equipment to till it, and buy your seedstock in bulk. Even then, do you honestly think you can compete at the scale of the commercial farms supplying the commercial mills providing the commercial feeds?
Sprouting trays, etc are great for enrichment (activities), and when carefully sellected, minor dietary adjustments (I like growing fenugreek, for instance, because of its relatively high methionine percentages for a green growing thing), but at the volume of feed a moderate flock of birds eats daily, its likely beyond the available space and time commitments of the typical backyard grower.
Best to treat it as treats, not more than 10% of the daily diet, by weight.
Even then, the math doesn't work. I can make a 20% protein feed for my birds (by mixing commercial bags) for around $0.28/lb right now. If I want to save labor, I can buy 18% protein at about $0.276/lb right now. With, lets pretend, 60 birds (my flock is in the sig, below), feeding 15# per day on average, to replace 3 months of feed at 10% substitution would be 1.5# per day times 92+/- days. About 150# of feed. Or $45.
Once you've bought the trays, built the frames, obtained your seed (economically, Amazon Prime, 50# bags), obtained soil, done the labor, raised the greens (and keep in mind, they are full of water, not near so nutrient dense as a commercial feed AND prone to freeze damage), are you really under $45 invested?
I feed, actually, between between 10# and 13# per day to my flock, seasonally dependent. How??? I've invested a few $Hundred$ into building a biodiverse polyculture of plants coming into season at differeng times of year which are a mix of forbs, legumes, herbs, grasses, grains, and even fruits. "My Acres of Weeds". and I happen to be in one of the most forgiving growing zones in the US. What works for me likely won't work well for you.
/edit and, fwiw, I'm likely throwing another $100 or so worth of seed into the pasture this spring, in hopes of adding still more diversity. How I'm going to keep my birds from eating it before it sprouts is a complete mystery to me. Likely trying "Cereal" Rye (not rye grass, seasonal or perennial), Buckwheat, and Sorghum (I have a small amount of native sorghum already growing, but its being edged out by other plants). If it saves me 6% on my feed costs over the course of the year, I break even. If the birds eat all the seeds, or we have another weird rainfall month, and nothing sprouts, then it cost me the equivalnt of almost 300# of feed, essentially a months worth.
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