Are you seriously suggesting torturing and slaughtering animals is a better alternative to a world where that doesn't happen and that might have less chickens?
1. Let die naturally of old age 2. Slaughter after a productive life 3. Slaughter mid life because disease 4. Slaughter mid life because money (e.g., price of feed) 5. Slaughter/cull young for sexing 6. Use fertilized eggs 7. Prevent fertilization, use unfertilized 8. Eliminate laying of eggs
Prevention of life is death in the limit.
In all cases, yours and the above, I find the argument less than compelling because life isn’t something that exists prior to birth; you’re not denying a soul from physical form because you happen to farm fewer chickens.
Arguing that the absence of life is the same as death is really just a clever way of justifying selfish ideals.