My thoughts exactly. Although I don't really get why chickens don't like sour things - when they have virtually no tastebuds!Avocado is one of the things chickens should definetely NOT eat. They also shouldn't eat garlic and onion, and they generally don't go for lemons and citrus fruits which won't kill them anyway, but are acidic. Strange that your chickens go for bannana. Ours hate it, and will only sometimes peck at the small pieces on the bannana peel. Oh, and crickets! I am sure you'll find that the crickets are a real favourite with the chicks! They are also sure to love grasshoppers as well, if they can catch them!