We have ISA Brown and Light Susex hens (specifying as I know breed affects lifespan).
From the research I did before getting our hens, I know Light Sussex can live up to about 8 years and ISA Browns a little less, however I'm curious to see what people have experienced "in real life" terms...
I'm asking as I want to settle a debate with DH. He reckons we'll have to keep replacing our hens every couple of years whereas I'm more optimistic!