I'm assuming the bulk of your food will be oats and wheat.
Wheat can range from 12-14% and oats slightly higher.
If you're using whole sunflower seeds, the protein percentage is quite low about 12-14% compared to meal(40%) or hulled sunflower seeds 20-25%.
So to be conservative, the oats, wheat and whole sunflower seed will average about 12% protein so you can mix and match with availability.
The highest protein ingredient will be the flax but that is only 18-20% protein.
To get a 17% protein feed, the ingredients would need to be about 5 parts flax and 1 part of a mix of the other 3.
I wouldn't feed anything that is 5 parts of one seed to 1 part of everything else.
The reason being, any single food stuff, though nutritious will be deficient in very many things. It's like a person living their life on plums. They're good for you, but plums alone will kill you in time.
If you have dehulled sunflower seed, that will be your high protein source.
You can use the Pearson's square to calculate ratios.
https://homesteadapps.com/app/free/feedcalc/pearsonsquare.php
Keep in mind that many of the protein percentages listed on the chart to the left of that page are inaccurate. Some are off by quite a lot.
http://nutritiondata.self.com/facts/nut-and-seed-products/3163/2
So to answer your initial question, no. It isn't too much protein, in fact it is low.
Humans have 9 amino acids that are essential because we can't synthesize them from other AAs.
Chickens have 14, arginine, glycine, serine, histidine, isoleucine, leucine, lysine, methionine, cystine, phenylalanine, tyrosine, threonine, tryptophan and valine.
It isn't just total dietary protein you're trying to achieve. You have to have the proper blend of essential amino acids.
In effect, a deficiency of any of the essential amino acids is the same as a deficiency of protein in general.
This is known as the limiting amino acid effect and can be visualized as a barrel with each stave made up of one of those 14 amino acids. If one or more are short, that's all the water the barrel will hold.
http://www.ncsu.edu/project/swine_e...itionguide/protein and amino acids/protaa.htm
All your ingredients are low in lysine.
Lysine deficiency causes slow body and muscle growth, depresses the immune system and a diet deficient in any of the amino acids will also affect feathering and egg production. They will consume more to try to satisfy their needs so they will be fatter and feed conversion rates will be inefficient.
A lack of any of the amino acids or other essential nutrients will eventually create abnormalities.
I understand the desire to formulate a feed with feedstuffs one has available but is normally not worth the ensuing problems. If one uses only grains and seed to make up feed, there will also be other deficiencies in vitamins, minerals, trace elements and essential fatty acids.
http://www.veeru.reading.ac.uk/comp2/Poultryweb/disease/nutri/nutri1.htm
http://www.merckmanuals.com/vet/pou..._acid_and_energy_deficiencies_in_poultry.html
http://journals.cambridge.org/downl...18a.pdf&code=dadc8f8bdfd3299cf111c69b82140018
http://www.aaapjournals.info/doi/abs/10.1637/7008
