i like to mix wheat seed(it has about 13% protien) in with my corn and if the weather is right I'll mix some rice bran in there. I like to add a little something like strawberry coolaid,cmere deer corn coat, or a shot of that vanilla spray if i am establishing a new feeding spot. This has been the first year in the last 10 years i havent put out any feed though.
I've always heard about the cotton seed, one thing that i always wondered is if cotton seed causes a type of birth control in deer. They say slaves use to eat cotton plants (roots especially)to keep from getting pregnant. I don't know if any of that is true just what i heard.
I hunted farms that grew nothing but cotton for 10-15 years and there was always some cotton eaten by deer and i never saw any lower numbers that we might have attributed to "birth control".