you can freeze these in ice too but I will just list them,
watermelon
cantalope
muskmelon
honeydew
bananas w/o skin
tomatoes
beans(green beans fresh, dried beans cooked)
peas
zucchini
lettuce
cabbage
peppers
strawberries
their own eggs, but cooked
garlic, but not onions, they will eat it but onions contain a chemical that is toxic to chickens