I have never been able to snap or cut a chicks head off. I worked with a vet that euthanized small reptiles by putting them in a mason jar with a cotton ball soaked in rubbing alcohol. put the lid on and within seconds the lizard passed. I tried it with a deformed chick. it worked very fast. It was much easier and didn't give me nightmares. Just wanted to give others another option. I hope I don't offend