Generally speaking when a chicken reaches the end of her second lay cycle she no longer lays enough eggs to be worth her feed. Time for the pot or sell her off. This has pretty well been true for many decades now as it was often discussed in the old poultry books for the early twentieth century. If the economics of the situation are of no concern to you then keep them as long as you want. If they are then that's the time to cull them out.
I have daughters so go both ways. We have a select few birds that are pets. They are named, and they can distinguish them right away from the other birds so they'll grow old and eventually expire of whatever it is that aging chickens expire of.
But everything else is livestock and when they reach the end of their second lay cycle they are done except for a select few I want to use for breeding.
I believe modern day practice among the big commercial farmers is to cull the entire flock after one lay cycle since they started taking so much heat over forced molting.
.....Alan.
I have daughters so go both ways. We have a select few birds that are pets. They are named, and they can distinguish them right away from the other birds so they'll grow old and eventually expire of whatever it is that aging chickens expire of.
But everything else is livestock and when they reach the end of their second lay cycle they are done except for a select few I want to use for breeding.
I believe modern day practice among the big commercial farmers is to cull the entire flock after one lay cycle since they started taking so much heat over forced molting.
.....Alan.