I culled a chicken for the first time I feel awful.

Our Rhode Island Red had been sick for a while and rather than keep taking her to the vet, my wife and I decided to cull her. I'd never done it before and I read that the easiest and quickest way is the broomstick method. I watched videos of it and it looked simple enough.

So I mustered up the courage, grabbed our chicken and took her out back. Well, I guess I pulled too hard for too long and ended up separating her head from her body. I was absolutely horrified. I couldn't believe I screwed that up. The worst part is seeing the pain on her face before it happened. I feel terrible.

I walked back inside, visibly shook. My wife asked me if I was okay and I said yes. I didn't tell her what happened, and I know that she doesn't want the details. But I hate myself right now.

Edit: Thank you everyone for helping me process this. it means a lot.