I personally, in real life, has seen a very unpleasant chemical euthanasia with my daughter's tiny shetland pony. What facts would you like Spooksandbolts? The fact that the sedative that was supposed to relax her sent her into a crazed state where it took 3 of us to hold her and try to keep her from escaping long enough for my husband to run over and help us tie her to a 6 x 6 so that 3 of us could hold her still long enough for the vet to administer the kill dose? Where she then crashed to the ground and took another 2 - 3 minutes to pass away completely. We have also put down by gun shot. I walked her to my dad who administered the shot. I couldn't stand to watch so I turned to walk away. I went 20 yards, he shot and some reaction made me turn back. She was already down and gone. I know which I prefer.