U_Stormcrow
Crossing the Road
Yes, the AA profile is off. Based on published averages, it has plenty of Lysine, and plenty of Threonine, will hit the recommends for almost every bird at every age. It has barely adequate amounts of Tryptophan. Subpar in Methionine, just as we would expect (less than 0.25%) - Lupins have very low levels of Met relative to the other critical AAs Its also very high in fiber - which doesn't benefit chickens nearly so much as it benefits us, and fat. In terms of energy content, its highly variable because of variations in digestibility.I spent some time considering a similar base mix for myself, but using peas instead of lupin. I concluded it was going to be short on amino acids. I'd love for someone to prove it otherwise, but it seems virtually impossible to provide all the right amino acids without an animal protein. For example, Purina FR, which has soybeans as the #2 ingredient, still adds supplemental methionine and lysine.
Now if your free range is chock full of insects, lizards or other critters your chickens can eat, they might be able to make up the difference. Otherwise, I think like the OP, you will need to give them some type of animal protein on a regular basis.
https://www.allaboutfeed.net/all-ab...tritional-value-of-yellow-lupin-for-broilers/
see also
https://www.researchgate.net/public...acid_digestibility_and_production_performance
https://www.researchgate.net/public...and_intestinal_morphology_of_broiler_chickens
etc. Basically, the more lupins you include, the more their particular fiber interferes with digestibility of pretty much everything. Yet another example of why looking at CP alone is insufficient.
That said, @EddieSalita is off to a good start. I have confidence he will - eventually - get this dialed in, precisely because he has an open mind and is crowdsourcing this effort to learn things he doesn't know, and might not discover on his own.