So I know that most animals have a list of "no-no" foods. Like for dogs & cats, they say no chocolate & coffee (duh), onion, grapes. Rabbits have a HUGE list of "no's" including iceberg lettuce and various other veggies, fruits, etc. Is there anything that can be dangerous for chickens, or are they just smart enough to not eat something they shouldn't? I've seen posts about feeding garlic, but is onion okay too? What about soy products, bread, various veggie seeds/skins (potato, squash seeds, pepper seeds, etc)? Just don't wanna poison my chickens. Of course none of the above would be a regular food source... just a treat (currently I've been tossing my cutting board scraps out for them after dinner, with whatever veggie pieces I can't use).