I have discovered that my 11 wk old chickens go crazy over green grapes. I try to halve them before giving them out but some of my roos will steal one before I can stop them ans swallow them whole. They love plain yogurt and strawberries too. Bananas didn't interest them very much. The RIRs like earthworms and crickets. Any other treats to try? We really want them to warm up to us!