poor little guys! I had a few of my chicks not keeping up growth wise, so I've been giving them poly vi sol without iron (get the generic at target or walmart. I give that to them daily, and I put some of their chick food in some plain yogurt, they go nuts! they'll love the hard boiled eggs too. You can also put a teaspoon or so of apple cider vinager in their water, it will help their little bodies absorb calcium and vit. D better. Good Luck with them! They're very lucky!