It is having a reason to stay.… My name is Papi. At least, that is what they call me now. I am a Papillon mix, small enough that a person can carry me under one arm, although I have never liked being carried for very long. My ears are large, my legs are thin, and when I am excited my entire body seems to vibrate before the bark actually comes out. I do not remember the animal shelter very clearly. I was only a few months old. What I remember is the smell. Disinfectant. Wet concrete. Food. Fear. There were many dogs in the communal enclosure. We slept pressed against one another because there was not enough room to sleep properly. Sometimes a dog would bark at the sound of footsteps. Sometimes all of us would bark together. And sometimes, for no apparent reason, everyone became silent. I learned something there. Silence did not necessarily mean peace. Sometimes it meant that everyone was waiting. One afternoon, a middle-aged woman walked slowly past the...