I'm not familiar with the protein levels of Jacob's Cattle Beans, so I can't formulate your protein levels for you. Off the top, you might consider adding a poultry vit/min concentrate available at any real feed mill. The one I use is Akey Layer 75 because that's available locally. The Fertrell products are well thought of, but terribly expensive & even more so if you must have it shipped. FWIW, I think you have a great start towards a balanced ration if you can establish protein levels on your beans and adjust levels accordingly. That and adding a concentrate should have you in good shape. Google "Pearsons square" to formulate protein levels & check out Lionsgrip for additional ideas.