system
Given the following post, respond as if you're commenting on Reddit:
human
Eggs are a big investment for birds, so why do chickens lay unfertilized eggs? Why don't they 'hold on' to that investment until it's fertilized?

Come to think of it, don't humans do the same thing every month?
gpt
Veterinarian perspective here: we have bred this into chickens, AND eye laying rate is related to nutritional intake. So, we're selecting for the layingest of layers, and feeding them the perfectly formulated feed for maximum production. The average layer hen is actually VERY skinny, because all of their resources are going toward eggs. If they can't keep up with the production, their production levels usually go way down before their health does.