My birds have eaten citrus, potato peels, chocolate, ham, chicken, beef, all sorts of fruit, rice (raw & cooked) cornbread, cookies, cake (they really like pieces with frosting), pumpkin, all types of melons, tomatoes, peppers, peas, beans, bugs, worms and so many things, I could never keep track of. There are some things they turn their beaks at, but not many. I have only had one case of sour crop and it was really a blocked crop. From this I learned that chickens should not eat rubber bands.