As a treat your hens can also have some cooked food such as rice, pasta, beans, or bread in small amounts [1]. Feb 27, 2020

Garlic, onions, and other strong tasting foods – These won’t harm your chickens, but they may impart an undesirable taste to the eggs that your hens lay. Avocado skins and pits – These contain persin, a fungicidal toxin that can be fatal to chickens. For more information, see Persin (on Wikipedia). May 25, 2015