What humane society? Do you have a link or something you would like to share with us?I did the research. I guess you guys haven’t. Your way sounds horrible to me, my way sounds horrible to you. The humane society said it was kind and gentle as hypothermia is a pleasant way to die, you go to sleep. Please remember in life your way is your way but there are other ways. I was offering an option. When we had to cull a cockerel my husband did do it by twisting his neck which was also quick and gentle.
Sorry you lost your wee chick and glad nature took its course.
That seems like a prolonged and needlessly stressful experience to me. Eventually they go to sleep, but before that they become cold, so cold as to cause them pain. Humane is getting it over quickly, not doing what makes you feel better about it.