Hi there. First time chicken daddy here. My chicks are about 4 weeks old now and will only eat the Chick Starter crumble. I've read of people giving their chicks greens and other "treats" but mine show absolutely no interest in anything else. I've even tried chopped raisins, corn, and a couple of juicy worms but they just peck at it once or twice and then show no further interest. One of them even spends the next 5 minutes trying to wipe its beak clean! Does anyone have any recommendations for starting to vary their diet a bit? Cheers.