It’s a question I get asked a lot, what plants are poisonous to hens?
As part of my answer you need to remember that hens are foragers – they nibble plants here and there, and then set off scratching for more bugs. Because the honest answer is that there are LOTS of plants that are considered toxic to chickens but, in my experience, most hens know not to eat them. Read Article
TBN Ranch Chicken Keeping Resources 