By the way, my chickens and goats eat it.
I have found that many plants die not because chickens eat them but because they "scratch" them out of the ground. Mine will not touch my Lemon Balm nor Cabbage. Braccias, Brocoli members are not good for chickens. I think they pretty much know what not to eat.
I recently fed mine some cooked Sweet Potatoes and I think it disagreed with them as I got one egg from my Dels and I think they're the ones that got the SP's. They are my best layers.