We bought a dozen hens in April 2009. They are great. We bought 14 more RIRs in March of this year. Two were roos and we gave them away. Two died in the brooder. Two died in the "juvenile" pen. Two died in the hen house. None of these birds ever looked ill or lethargic. Never lost their appetites or spunk. We just go out to the barn or henhouse and find one dead. I often check on everyone mid-day. The last one who died, before today, was fine at noon and dead at 4:30. We also got six Isa Browns in April of this year. They are as fat and sassy as the first dozen. My husband thinks we got a "bad batch" of hens. Is this possible? All of our birds were purchased at the same feed store. Thanks.