Is this the Justin Rhodes' recipe you're referring to? Is it suitable for chicks or just adults? Is there another protein source that isn't soy that could replace the fish meal? Even touching feed with soy gives me a very severe allergic reaction. I have similar issues with fish.
- 30% Corn
- 30% Wheat
- 20% Peas
- 10% Oats
- 10% Fish Meal
- 2% Poultry Nutri–Balancer
- Free Choice Kelp
- Free Choice Aragonite
That looks like the Rhodes' recipe, yes. and replacing the fish meal would require completely reformulating the thing.
I'll demonstrate real quick* (IMPORTANT CAVEATS BELOW) just how important the fish meal is to his recipe.
In my calculator, J RHodes recipe outputs as (theoretically):
20.05% Protein, 4.12% Fiber, 3.68% fat. Its AA profile for the big four are 0.4, 1.15, 0.74, 0.21 against targets of at least 0.35, 0.7, 0.6, 0.2. In short, its as good or better (apart from the fact that you don't know your ingredients are actually up to average) as most commercial feed bags.
Take away the fish meal?
(Theoretically) 13.9% Protein, 4.58% fiber, 2.87% fat, and the big four are now 0.2 (grossly deficient), 0.65 (borderline), 0.48 (low), 0.14 (deficient).
Yes, a full 1/3 of the protein, and most of the the amino acids, come from that 10% fish meal. It makes the rest of the recipe possible.
Now, you can attempt to juice the recipe with higher value ingredients.
"Naked" or hulled oats to slightly increase protein and reduce fiber. You can use hard red winter wheat instead of soft wheat to again increase protein. You can't add more peas, they are already present in quantitity greater than the industry recommends (as is the fish meal, honestly). You could use alfalfa meal, if you can find it in good quality, but its chock full of the same chemicals that most try to avoid when they cut soy from their diet. You can cut back on the corn, increasing costs.
20 Alfalfa meal, 20 corn, 10 dehulled oats, 30 hard wheat, 20 winter peas and your numbers are more like (theoretically) 16.6, 8.74, 2.75, 0.24 (deficient), 0.77 (fine), 0.59 (close enough), 0.18 (near there)
At this point, we hardly resemble the Rhodes recipe, we are inferior to most everything on the shelf, we mostly haven't avoided the things that make people avoid soy, and we've greatly increased our price per pound.
THAT is why I don't recommend people try this at home. Also, IMPORTANT CAVEAT BELOW.
*understand, these are AVERAGES obtained from a feed website, not an assay of the ingredients you are actually using. The nutrition label on the bag (if there is one) always trumps the averages. Be aware also that some common feed sources are now routinely lower than this published average as crops have changed, AND that I'm offering a theoretical value, not "as fed" - again for speed. "As fed" is usually about 10% +/- less nutrition than this calculates, for feed mixes based on dried ingredients.
/edit and his recipe is appropriate for all ages. Chicks actually have higher nutritional requirements - and are more sensative to dietary deficiencies and imbalances - than adult birds are.