I have to say, weird as it may seem, my chickens hate cabbage! They hate all cruciferous vegetables so that whole cabbage tether ball thing is not an option for us.
Our biddies look at me as if I'm trying to poison them or something when I offer them cabbage. There are some other greens they don't like, either, including some of the lettuces.
On the other hand, no blueberry growing below two feet evades them if I don't keep a strict eye out.