Sardines packed in sunflower oil. Raw (or cooked, but they seem to like raw better) hamburger. Hard boiled eggs, especially the yolk and you can apply a drop of liquid chicken vitamins to this easily, the yolk will absorb it readily. Watermelon, seeds and all. Cantaloupe, seeds and all. Cooked squash, seeds and all. Some of my flocks have enjoyed cucumber, seeds and all, while others have absolutely no interest in them. Tomatoes... I cut a small hole into the side then let them have at it. My girls go bananas for ripe (and overripe) BANANAS.