I have a mixed flock, of many ages, my oldest hens are 2 RIR's, and are 6 years at least, and lay an egg every other day or so. My first Americana is 5 years, and also lays every other day. From there, we go down mostly to 2 years old and under, and I dont really keep track of them, as they all lay communally in one or two nests, my oldest 3 have thier own special spot.
Occasionally someone will molt, and stop laying for a while, and sometimes in the fall the count falls off, but as soon as I start using the day heat light to keep the chill out, egg count goes back up.
I suggest you plan on getting a few new chicks each spring, and as they mature, they will pick up the slack from any aging ladies, that way you have a steady flow, but are not overwhelmed, or stuck with a flock of no layers.
Good Luck!
Occasionally someone will molt, and stop laying for a while, and sometimes in the fall the count falls off, but as soon as I start using the day heat light to keep the chill out, egg count goes back up.
I suggest you plan on getting a few new chicks each spring, and as they mature, they will pick up the slack from any aging ladies, that way you have a steady flow, but are not overwhelmed, or stuck with a flock of no layers.
Good Luck!