I'm new here and just recently had 4 new RIR chicks pass while I was at work yesterday. Everything was great for 6 days and not quite sure what happen. This will be my second time raising chicks and was succesful the first around. The heat was good, fresh food and fresh water every 3 hours. So I don't know, very sad though! What I did find out was that my daughter 5 year old, placed 3 or 4 small blades of grass in the brooder the night before we found them while I was out of town on work. Would the grass have caused this? Any info would help so...Thanks