Apple seeds contain cyanide. Also avoid pits/seeds from apricots, cherries, peaches, pears and plums which also contain trace amounts of cyanide. But the fruits themselves are all fine cored or pitted.

In addition to their core diet of pellets, you can feed them grains such as corn or wheat to give them some variety. Chickens love fruit and vegetables, and you can give them this daily. Our girls love vegetable peels, bananas, apple cores, carrots, and broccoli. Mar 1, 2021

Select fruits, vegetables and grains will keep chickens happy and ensure they are receiving a nutritionally balanced diet. Good choices include leafy greens, cooked beans, corn, non-sugary cereals and grains, berries, apples and most other fruits and vegetables.