Are there any greens from my garden that I shouldn't feed to my chickens?

I grow tomatoes, peppers, eggplants, strawberries, corn, rhubarb, beets, turnips, parsley, oregano, thyme, onions, dill, cukes, zukes, pumpkins, radishes, lettuces, broccoli, etc. When I harvest veggies, or clear plots of old plants can I give the leftover greens to my chickens indiscriminately? So far I haven't fed them anything I haven't eaten myself (except bolted lettuces and gr), but are there any plants I should definitely avoid?