Subtraction what?!? That's not chicken math, only ADD ADD ADD!
If I raise chicks I usually sell some off on craigslist. I lose some birds to predation, though rare. I keep most of my old hens because they have laid eggs for me for multiple years and it is the least I can do to repay them. Many people put them in the pot- mine have names so I can't do that. I've given away some retired hens for free on craigslist to people who just want animals around. Lots of options.

If I raise chicks I usually sell some off on craigslist. I lose some birds to predation, though rare. I keep most of my old hens because they have laid eggs for me for multiple years and it is the least I can do to repay them. Many people put them in the pot- mine have names so I can't do that. I've given away some retired hens for free on craigslist to people who just want animals around. Lots of options.