"Be sure to breathe some puppy breath for me," called out Nan as she got into her car Saturday. We had finished tracking (I laid tracks for her 2-year-old Australian Shepherd Zeke, who tracks with joy, enthusiasm, and accuracy!) and chatted for a couple hours about matters dog and human. She knew I hoped on Sunday to visit our friend Roseanne who had just picked up her new German Shepherd Dog puppy, Tucker.What is it about puppy breath that is so wonderful? The warmth, the sweetness, the rhythm of it.