I have not had any aggressive rooster experience yet.
Should one turn bad on me -- which is probably inevitable -- his name will be changed to "Chili".
Well, I was taking flowering tops off my basil last night and just tossed them into the chicken run since I didn't have enough to make setting up the drier worth it and didn't have an immediate use for fresh basil.
They don't really like it.
Fresh weeds are their green of choice.
My philosophy is to enable my chickens to do chicken things -- to scratch, to forage, to perch, to dust bathe -- as naturally as I can given that I have to confine them to a run.
I give them plenty of deep litter to scratch in. There is nothing they like more than a cartfull of leaves and pine...