I'm pretty sure some breeds 'turn off' earlier than others. I guess I'm asking if there is a breed that is known to lay longer than others? The amount of eggs per week is less important to me than the number of years a hen will lay. I'm thinking of building a large chicken run between 2 long vegetable greenhouses to save on the cost of fencing, and to produce compostable waste for the veggies. A nice combination. I'd rather have more hens making fewer eggs and more compost over a longer time, than fewer hens making more eggs and less compost that I would have to replace in a couple years or so.....Does that make sense? I'd like to avoid culling non-productive birds as much as possible. I know birds like Orpingtons lay fewer eggs a week than RIRs, does that translate into more years of egglaying? Thanks for any input.