Those are like hens that don't lay anymore, right?
I might, depending on their breed/personality, honestly.
I have a couple of hens who are going into their fifth year, and I do love taking care of them, but I'm kind of worried about when they'll start dying off. I don't have a lot of medicine or any access to an avian vet, so dealing with severe illnesses is tricky and mostly involves quarantining inside my house and day-to-day care with what I have.
It... also depends on what the person I'm taking them in from wants with them. I kind of have the attitude of, "it is not your responsibility anymore, so it's kind of up to me." Fussy roosters, for example, could well end up being dinner, and due to the aforementioned lack of access to much avian medicine, especially ill hens may or may not end up being culled to put them out of their misery.
... This probably makes no sense, sorry.
I dislike culling birds (even Tourettes is starting to grow on me), so that won't be a method used unless a bird is being especially fussy or is especially ill, if you're wondering.