That being said I was left wondering what caliber is recommended for euthanizing farm animals and pets. I've been told that cows are euthanized with .22lr but that is from up close. I've been told horses are often shot when they injure themselves too badly too recover but no mention of caliber involved. I've been told people have euthanized their dogs using a .22lr and been fine, and people using a .22lr and having to fire 2+ rounds instead of 1. Some people claim the bigger the better, like one person who said they used a 30-30 on their dog, and some say a .22lr will suffice. So to those who own farm animals and pets, and have experience euthanizing their animals by way of a gun, what caliber do you recommend? Is the caliber weight/skull dependent? For example cows have thick skulls so a .22lr must be up close, but a 30-30 will do the job as long as your not at the end of its range. Cats have extremely thin skulls and anything above a .22lr will make a very big mess and prevent you from having a an open casket ceremony for the little one (think kids and a family pet). Is the caliber dependent on what you plan to do with the remains? For example, a family pet might get an open casket ceremony and this disintegrating its head would not be ok, where as obliterating the head of a donkey is acceptable because it will not receive the same good bye. What do you consider more humane, a bullet or a needle?