I just recently had to euthanize a chick (severely deformed legs that no amount of splinting would help--and goodness knows I tried). I used starter fluid (the kind for your car engine). It was very quick and very peaceful. The chick did not appear to suffer at all--it simply went to "sleep" in a matter of seconds after I sealed the bag and never moved again. I believe it took only a couple of minutes for him to actually pass. (I watched. I wanted to make sure that, if I use this method again, that it was humane.) Not that it wasn't horrible. It was. But I made the decision to take responsibility for these animals, so it's my responsibility to ensure that they don't suffer. If that means ending one's life in certain instances, then I have to get past the fact that it is uncomfortable for me and do what is in the best interest for my animals. If that meant using scissors, I would (though yes I would personally have a really hard time with it--I am a vegetarian and am very uncomfortable with the thought of killing an animal for any reason--but I am more uncomfortable with the thought of an animal suffering), but in my experience the starter fluid method did not seem to be prolonged or painful for the animal.