Since your daughter and babysitter's daughter both love feeding them, here are some "good" treat ideas that are highly nutritional. I would go ahead and pre-portion them out anyway. Black oil sunflower seeds (BOSS), mealworms, grated mozzerella cheese, tuna fish (low salt), and grapes (great fun!). Give these out in moderation and they can still have the fun of feeding them. I'm sure they'll be just fine, and this is a great opportunity to learn about nutrition. Good food=eggs!