I have kept Rhode Island Reds, Golden Comets, Buff Orphingtons, Light Brahmas, Americaunas and Barred Rocks. My Barred Rocks have to be my favorite chickens and Rhode Island Reds are a close second. They are durable, resourceful, quiet, calm, excellent foragers and occasionally go broody. I don't currently have a rooster but I've been told that if you have a broody hen that raises her chicks successfully those chicks will be wiley and almost predator proof. As far as sick chicks I've had excellent results with a herbal product called VetRX which is available at most feed stores. Probiotics are the way to go for sure. Good luck with your chicken!