Yeah @NatJ I'm not aware of any reasons to avoid them eating bean leaves. I have seen recommendations to avoid them eating the dried beans themselves. The dried beans contain a substance that can harm them. One bite won't kill them, it's a matter of dosage. And if the beans are fully cooked...
Something like this. As I understand this thread, it's not there for your chickens to graze in. It is there for you to toss things into their run for them to eat as a supplement to their normal feed. I do that from the main garden but having something handy is so much nicer.
I'm not sure...