Way too much over all
fat IMO... you need a leaner source of protein. Are those seed you're giving whole or hulled?
Sprouting those, if you are able will maximize your benefit from any of them.. and wouldn't take too much effort for just a couple birds... which In see you already say you do sometimes anyways.
Seems like I remember reading that millet was high in something undesirable.. might consider oats as another alternative?
I also am no nutritionist... But most feeds
I have seen aim between 16-22% protein, under 4% fat, and about 5-7% fiber. With her being a broiler breed and aiming for long life, in addition to age... I
personally would aim for 18%-20% protein, 3% ish fat, and slightly high in the fiber end of things... *maybe* up to 10%.
Eggs are a great supplement.. but too much of a good thing is not, long term. They are 34% protein and 64% fat by energy count.
It's true that teenage birds will go through mini molts while getting in their adult plumage. And feathers are made from 90% protein and it's amino acids. Some of which must be derived from animal sources. I don't know the exacts of which ones have what.. but thinking yes eggs are one, and maybe bugs, tuna or other cooked fish, or other lean cooked meat. A nut you don't mention which can be another good source of omega's is walnuts, I believe. And what I mean by saying that is that seems like variety is best
if possible.
If you can... maybe look up the ingredients you are using and right down their major nutritional values... aka protein, fat, and carbs including fiber... then add them up in your mixed amounts and divide (blah blah

)... and get YOUR basic analysis of what you are feeding. So you can know the truth about where you stand nutritionally.
Just brainstorming... because I can tell you care!