Just wish you would have ate them.Here's my story of shooting two cockerels I had to cull because they became unholy terrors to me and the pullets at 4 months when hormones hit.
Before I caught the bird, I got my revolver and ear muffs ready in a spot behind the garden shed, out of sight of the other chickens.
I got a fishing net (get one that is mostly open net, not tiny mesh) and caught the bird. I took him to the spot, put on my muffs, put the muzzle to the back of his head, and pulled the trigger. The bullet exited the bird's head safely into the ground. He did the death throes thrash for about 15 seconds, and was still. Then I cried, hard.
I did the second one the next day. That afternoon, there was peace in my flock once more.
There was no plan to eat either of them, so they are buried in the garden. I thank them for their contribution to the soil. It wasn't their fault they were born male.