Recently, yesterday to be exact, I lost my 2.5 year old PR hen. She died suddenly. The rest of my flock is 2.0, 2.5 and 3.0 years old. As a general rule, is my flock reaching an age where death is becoming increasingly likely? The reason is, I am wondering if it may be getting time to renew teh entirte flock instead of just getting a pair of new hens.