I lost a chicken over winter. She was dead in the morning. I fed them old black beans and I though that might be it. They were cooked, then left in fridge for like 2 weeks? So I looked online to see what I should avoid giving them and my big question is (an ongoing debate in our house).. will onions kill chickens? We've been separating our onions from the compost ever since this chicken died.. just in case. Any ideas?