Genetically modified has a specific definition that involves adding genes in a lab.
Hybrid is through breeding, including artificial insemination of semen produced by a live male rooster. Broilers are hybrids that don't breed true.
Different cooking methods for different ages.
I use a cut up Kitty litter jug as a kill cone
And PVC pipe cutter to dispatch.
Sharp sharp tree limb loppers work too. I use those on my turkeys