I used to think that hard red winter wheat was 17% protein also but was corrected by a BYC'er and found out it is closer to 12-14% protein.
Here:
from
http://www.ams.usda.gov/mnreports/jo_gr110.txt
"Bids for 11.5 percent protein US 1 Hard Red Winter Wheat for November
delivery trended 1.75 cents per bushel higher than Tuesday’s noon bids
for the same delivery period in following the slightly higher Kansas City
December wheat futures."
and
from
http://en.wikipedia.org/wiki/Wheat
"100 grams of hard red winter wheat contain about 12.6 grams of protein"
Also you might try split peas as an alternative to "field peas." They are actually cheaper for me (at the grocery store bulk bins) than the Austrian Peas I just bought recently per pound from the feed store! Also my chickens find the split peas to be more palatable.