Hi, I have a four week old and two three week olds. I gave small mealworms and the eldest figured it out and loves them...the two younger ones just look at them for now. What else can i give them as treats? I don't remember at what age I introduced certain foods to my older chickens. I know my big girls love grapes and oats. Are the chicks too young to eat those things? I have parakeet grit in their brooder.