We–those of us who love, live with, and/or work with dogs–will all face the euthanasia of a dog we adore at some point in our lives. Most of us will face it many, many times. Usually the dog on the other end of the needle is old, or sick, or both. But there is a type of euthanasia in which the dog dying might be physically healthy; perhaps even young and vibrant. This type is the behavioral kind; the choice to put a dog to death because his behavior makes him unfit for this human world of ours. Causing a dog’s death with intention is gut-wrenching and surreal, even when it is fair. I’ve held my old dogs in my arms as they died, knowing they’d lived fully and well, and still felt as though I was flayed and left dying myself. When Kelso’s vet ended his life I wished…