I am new to this forum. I have/had 7 chickens. 1 died today - which is why I logged on to try and get some advice. I currently have (2) 7 month old's - a RIR, and a Columbian Wyandotte....then I have 4 that are 10m old, and all laying. They are 1 black australorp (my star/head hen), 1 black...