My 3 year old hens are still laying almost every day. They lay every day for quite a few days and then miss a day. I think one of the mods recently posted that she has 5 year old hens still laying almost every day.
Things that can stop a chicken from laying temporarily are going broody, a heavy molt or the shorter days of winter. Since unwashed, refrigerated eggs have been known to last as long as 6 months, I just store a few more in the frig, going into times of the year when production may slow down a bit. Usually, they still lay quite well the first fall and winter. Their feathers are still pretty new. The next year is when mine have usually had more of a tendency to go broody, if they're going to go broody. That's also the year when they start doing a heavy molt in the fall.
The seasonal ebb and flow of egg production is a much bigger deal in the egg business, than it is for the average backyard flock. A percentage point or two in production for a large corporate egg laying business is also a much bigger deal than an egg or two in a backyard hobby flock. I think these are all part of the concept of egg producers culling their flocks at 2 years old. Most heritage breeds of chickens continue to lay for a long time, even if they eventually start to slow down. Didn't someone on the forum even have a 12 year old hen that would still lay an egg a week? Wasn't that Goldy?
Things that can stop a chicken from laying temporarily are going broody, a heavy molt or the shorter days of winter. Since unwashed, refrigerated eggs have been known to last as long as 6 months, I just store a few more in the frig, going into times of the year when production may slow down a bit. Usually, they still lay quite well the first fall and winter. Their feathers are still pretty new. The next year is when mine have usually had more of a tendency to go broody, if they're going to go broody. That's also the year when they start doing a heavy molt in the fall.
The seasonal ebb and flow of egg production is a much bigger deal in the egg business, than it is for the average backyard flock. A percentage point or two in production for a large corporate egg laying business is also a much bigger deal than an egg or two in a backyard hobby flock. I think these are all part of the concept of egg producers culling their flocks at 2 years old. Most heritage breeds of chickens continue to lay for a long time, even if they eventually start to slow down. Didn't someone on the forum even have a 12 year old hen that would still lay an egg a week? Wasn't that Goldy?