Interesting list. I'm wondering now though... how accurate or are they just toxic in exaggerated amounts? I mean, water is toxic if you drink enough of it. A lot of those plants are ones that my chickens eat daily, like chickweed and nettle. They're not sick. My chicks, in fact, have devoured every leaf of the nettle plants surrounding the run - every leaf they could reach through the chicken wire. If it were toxic you'd think they'd be dead by now.
Heck, I love nettles! They're tasty in soup or eggs and contain lots of good vitamins. Cabbage and kale??? I've been feeding my chickens both. No deaths or illness yet.